BATTERY PACK

Disclosed is a battery pack, which can observe welding quality from its appearance while preventing a circuit board from being damaged when laser beam welding is performed in a state in which a protective circuit module and battery cells are mounted on a frame. In an example embodiment, the battery pack includes a protective circuit module including a circuit board extending in a first direction, an electrode tab coupling portion mounted on a top surface of the circuit board, and a protection layer positioned under the electrode tab coupling portion, and a battery cell including an electrode tab protruding to one end and having a polarity, and coupled to a top surface of the electrode tab coupling portion, wherein the electrode tab of the battery cell and the electrode tab coupling portion and the protection layer of the protective circuit module are stacked and coupled in a second direction perpendicular to the first direction.