A portable computer includes a base unit, a cover unit, a keyboard, and a locking member. The base unit defines a receiving portion. The receiving portion defines a plurality of cutouts in two opposite sidewalls thereof. The cover unit is pivotably connected to the base unit. The keyboard is detachably mounted to the base unit. The keyboard defines a locking hole. The locking member is slidably received in the receiving portion. The locking member includes a locking portion inserted into the locking hole of the keyboard, and at least one protrusion extending from each of two opposite sides thereof for being selectively received in the cutouts of the receiving portion of the base unit.