diff --git a/frontend/components/global/Header.vue b/frontend/components/global/Header.vue
index 4180758..55a4ff1 100644
--- a/frontend/components/global/Header.vue
+++ b/frontend/components/global/Header.vue
@@ -3,6 +3,7 @@
 
 import useGetAccount from "~/composables/api/account/useGetAccount";
 import { useAuth } from "~/composables/api/auth/useAuth";
+import useGetCategories from "~/composables/api/categories/useGetCategories";
 import useGetCartOrders from "~/composables/api/orders/useGetCartOrders";
 import { NAV_LINKS } from "~/constants";
 
@@ -11,16 +12,35 @@ import { NAV_LINKS } from "~/constants";
 const route = useRoute();
 const { token } = useAuth();
 const isSideDrawerOpen = ref(false);
+const isCategoriesMenuOpen = ref(false);
 
 // queries
 
 const { data: account } = useGetAccount();
-
 const { data: cart } = useGetCartOrders();
+const { data: categories } = useGetCategories();
 
 // computed
 
 const isHomePage = computed(() => route.path === "/");
+
+const megaMenuCategories = computed(() => {
+    if (categories.value) {
+        return categories.value.map((item) => {
+            return {
+                title: item.name,
+                subitems: item.subcategorys.map((item) => {
+                    return {
+                        title: item.name,
+                        link: item.slug,
+                    };
+                }),
+            };
+        });
+    }
+
+    return [];
+});
 </script>
 
 <template>
@@ -114,7 +134,9 @@ const isHomePage = computed(() => route.path === "/");
                         :key="index"
                         :to="link.path"
                         class="underline-offset-[10px]"
-                        activeClass="underline"
+                        :activeClass="isCategoriesMenuOpen && link.title !== 'دسته بندی ها' ? 'underline' : ''"
+                        :class="isCategoriesMenuOpen ? 'underline' : ''"
+                        @mouseenter="link.title === 'دسته بندی ها' ? (isCategoriesMenuOpen = true) : undefined"
                     >
                         {{ link.title }}
                     </NuxtLink>
@@ -141,4 +163,9 @@ const isHomePage = computed(() => route.path === "/");
     </header>
 
     <SideDrawer v-model="isSideDrawerOpen" />
+
+    <MegaMenu
+        :items="megaMenuCategories"
+        v-model:isOpen="isCategoriesMenuOpen"
+    />
 </template>
diff --git a/frontend/components/global/MegaMenu.vue b/frontend/components/global/MegaMenu.vue
new file mode 100644
index 0000000..b428108
--- /dev/null
+++ b/frontend/components/global/MegaMenu.vue
@@ -0,0 +1,138 @@
+<script lang="ts" setup>
+// types
+
+type Props = {
+    isOpen: boolean;
+    items: {
+        title: string;
+        subitems: {
+            title: string;
+            link: string;
+        }[];
+    }[];
+};
+
+// props
+
+const props = defineProps<Props>();
+const { items, isOpen } = toRefs(props);
+
+// emits
+
+const emit = defineEmits(["update:isOpen"]);
+
+// states
+
+const selectedItem = ref(0);
+const selectTabTimer = ref<NodeJS.Timeout | null>(null);
+
+const isScrollLocked = useScrollLock(window);
+
+const navbarEl = ref<HTMLElement | null>(null);
+const { height: navbarHeight } = useElementSize(navbarEl);
+
+// computed
+
+const selectedItemSubItems = computed(() => {
+    if (items.value.length > 0) {
+        return items.value[selectedItem.value].subitems;
+    }
+
+    return [];
+});
+
+// methods
+
+const menuTabMouseEnter = (index: number) => {
+    if (selectTabTimer.value) clearTimeout(selectTabTimer.value);
+    selectTabTimer.value = setTimeout(() => {
+        selectedItem.value = index;
+    }, 150);
+};
+
+const menuTabMouseLeave = () => {
+    if (selectTabTimer.value) clearTimeout(selectTabTimer.value);
+    selectTabTimer.value = null;
+};
+
+// watches
+
+watch(
+    isOpen,
+    (newValue) => {
+        isScrollLocked.value = newValue;
+
+        if (!newValue) {
+            selectedItem.value = 0;
+        }
+    },
+    {
+        immediate: true,
+    }
+);
+
+// lifecycle
+
+onMounted(() => {
+    navbarEl.value = document.querySelector("#header-navbar");
+});
+</script>
+
+<template>
+    <Transition
+        name="fade"
+        mode="out-in"
+    >
+        <div
+            v-if="isOpen"
+            :style="{ marginTop: `${navbarHeight}px` }"
+            class="fixed right-0 top-0 w-full z-999 bg-black/50 h-svh border-t border-slate-200"
+        >
+            <div
+                class="flex h-200 bg-white"
+                @mouseleave="$emit('update:isOpen', false)"
+            >
+                <div class="bg-slate-100 p-4 flex flex-col overflow-y-auto mask-b-from-90% pb-8">
+                    <button
+                        v-for="(item, index) in items"
+                        :key="item.title"
+                        class="text-black transition-all p-4 rounded-xl cursor-default"
+                        :class="index === selectedItem ? 'bg-blue-100 text-blue-500' : 'bg-slate-100'"
+                        :id="`mega-menu-tab-${index}`"
+                        @mouseenter="menuTabMouseEnter(index)"
+                        @click="selectedItem = index"
+                        @mouseleave="menuTabMouseLeave"
+                    >
+                        {{ item.title }}
+                    </button>
+                </div>
+                <div class="overflow-y-auto w-full mask-b-from-90% pb-8">
+                    <Transition
+                        name="fade"
+                        mode="out-in"
+                        :duration="150"
+                    >
+                        <div
+                            :key="selectedItem"
+                            class="grid grid-cols-4 p-4 text-back w-full h-fit"
+                            :style="{
+                                // gridTemplateRows: 'repeat(5, auto)',
+                                // justifyContent: 'center',
+                            }"
+                        >
+                            <NuxtLink
+                                v-for="item in selectedItemSubItems"
+                                :to="'https://google.com'"
+                                class="p-4 whitespace-nowrap h-fit text-slate-500 flex items-center justify-between hover:text-blue-500 hover:-translate-x-1.5 transition-all"
+                            >
+                                <span class="truncate w-[90%]">
+                                    {{ item.title }}
+                                </span>
+                            </NuxtLink>
+                        </div>
+                    </Transition>
+                </div>
+            </div>
+        </div>
+    </Transition>
+</template>