diff --git a/Libraries/LibWeb/IndexedDB/IDBTransaction.cpp b/Libraries/LibWeb/IndexedDB/IDBTransaction.cpp
index 6e58b3ba56c..d73e6bd128c 100644
--- a/Libraries/LibWeb/IndexedDB/IDBTransaction.cpp
+++ b/Libraries/LibWeb/IndexedDB/IDBTransaction.cpp
@@ -7,6 +7,7 @@
 #include <LibWeb/Bindings/Intrinsics.h>
 #include <LibWeb/Crypto/Crypto.h>
 #include <LibWeb/HTML/EventNames.h>
+#include <LibWeb/IndexedDB/IDBObjectStore.h>
 #include <LibWeb/IndexedDB/IDBTransaction.h>
 #include <LibWeb/IndexedDB/Internal/Algorithms.h>
 
@@ -118,4 +119,32 @@ WebIDL::ExceptionOr<void> IDBTransaction::commit()
     return {};
 }
 
+GC::Ptr<ObjectStore> IDBTransaction::object_store_named(String const& name) const
+{
+    for (auto const& store : m_scope) {
+        if (store->name() == name)
+            return store;
+    }
+
+    return nullptr;
+}
+
+// https://w3c.github.io/IndexedDB/#dom-idbtransaction-objectstore
+WebIDL::ExceptionOr<GC::Ref<IDBObjectStore>> IDBTransaction::object_store(String const& name)
+{
+    auto& realm = this->realm();
+
+    // 1. If this's state is finished, then throw an "InvalidStateError" DOMException.
+    if (m_state == TransactionState::Finished)
+        return WebIDL::InvalidStateError::create(realm, "Transaction is finished"_string);
+
+    // 2. Let store be the object store named name in this's scope, or throw a "NotFoundError" DOMException if none.
+    auto store = object_store_named(name);
+    if (!store)
+        return WebIDL::NotFoundError::create(realm, "Object store not found"_string);
+
+    // 3. Return an object store handle associated with store and this.
+    return IDBObjectStore::create(realm, *store, *this);
+}
+
 }
diff --git a/Libraries/LibWeb/IndexedDB/IDBTransaction.h b/Libraries/LibWeb/IndexedDB/IDBTransaction.h
index 3913d1c506e..1894771363a 100644
--- a/Libraries/LibWeb/IndexedDB/IDBTransaction.h
+++ b/Libraries/LibWeb/IndexedDB/IDBTransaction.h
@@ -59,8 +59,11 @@ public:
     [[nodiscard]] bool is_readwrite() const { return m_mode == Bindings::IDBTransactionMode::Readwrite; }
     [[nodiscard]] bool is_finished() const { return m_state == TransactionState::Finished; }
 
+    GC::Ptr<ObjectStore> object_store_named(String const& name) const;
+
     WebIDL::ExceptionOr<void> abort();
     WebIDL::ExceptionOr<void> commit();
+    WebIDL::ExceptionOr<GC::Ref<IDBObjectStore>> object_store(String const& name);
 
     void set_onabort(WebIDL::CallbackType*);
     WebIDL::CallbackType* onabort();
diff --git a/Libraries/LibWeb/IndexedDB/IDBTransaction.idl b/Libraries/LibWeb/IndexedDB/IDBTransaction.idl
index 667d36a6cdd..d31e70bf604 100644
--- a/Libraries/LibWeb/IndexedDB/IDBTransaction.idl
+++ b/Libraries/LibWeb/IndexedDB/IDBTransaction.idl
@@ -9,7 +9,7 @@ interface IDBTransaction : EventTarget {
     readonly attribute IDBTransactionDurability durability;
     [SameObject, ImplementedAs=connection] readonly attribute IDBDatabase db;
     readonly attribute DOMException? error;
-    [FIXME] IDBObjectStore objectStore(DOMString name);
+    IDBObjectStore objectStore(DOMString name);
     undefined commit();
     undefined abort();