A portable electronic apparatus including a first body, a second body, and a keyboard is provided. The second body is pivotally connected to the first body. The keyboard is disposed on the first body and includes a plurality of key structures. One of the key structures includes an elevating platform, a key cap, and a camera. The key cap is detachably mounted to the elevating platform, and the camera is mounted at one side of the key cap facing the elevating platform. After the camera is detached from the elevating platform together with the key cap, the camera is mounted and positioned to the second body together with the key cap, and at least a portion of the camera is exposed to the outside.