A battery pack comprising: two or more plate-shaped battery cells (210, 220) having anode terminals (212, 222) and cathode terminals (213, 223) formed at one sides thereof comprising sealed surplus portions (211, 221), the battery cells (210, 220) being arranged in plane such that the electrode terminals (212, 213, 222, 223) of the battery cells (210, 220) are aligned in one direction; a pack frame comprising two or more battery cell receiving parts surrounding outer circumferences of the battery cells (210, 220) in a state in which upper and lower surfaces of the battery cells (210, 220) arranged in plane are opened; a protection circuit module electrically connected to the electrode terminals (212, 213, 222, 223) of the battery cells (210, 220) aligned in one direction to control operation of the battery pack; a middle mold to receive the PCM, the middle mold being loaded on the sealed surplus portions (211, 221); an electrically insulative member applied into a space defined by the sealed surplus portions (211, 221) and the pack frame and onto the middle mold and the PCM such that the middle mold and the PCM are integrated with the pack frame; and a label to cover the battery cells (210, 220), the pack frame, and the electrically insulative member, and characterized in that the pack frame is provided at at least one side thereof with one or more fastening parts protruding outward in a direction parallel to a plane arrangement direction of the plate-shaped battery cells (210, 220), and the fastening parts are suitable for fastening to a device by bolts, nuts, a rivet or hook structure. two or more plate-shaped battery cells (210, 220) having anode terminals (212, 222) and cathode terminals (213, 223) formed at one sides thereof comprising sealed surplus portions (211, 221), the battery cells (210, 220) being arranged in plane such that the electrode terminals (212, 213, 222, 223) of the battery cells (210, 220) are aligned in one direction; a pack frame comprising two or more battery cell receiving parts surrounding outer circumferences of the battery cells (210, 220) in a state in which upper and lower surfaces of the battery cells (210, 220) arranged in plane are opened; a protection circuit module electrically connected to the electrode terminals (212, 213, 222, 223) of the battery cells (210, 220) aligned in one direction to control operation of the battery pack; a middle mold to receive the PCM, the middle mold being loaded on the sealed surplus portions (211, 221); an electrically insulative member applied into a space defined by the sealed surplus portions (211, 221) and the pack frame and onto the middle mold and the PCM such that the middle mold and the PCM are integrated with the pack frame; and a label to cover the battery cells (210, 220), the pack frame, and the electrically insulative member, and characterized in that the pack frame is provided at at least one side thereof with one or more fastening parts protruding outward in a direction parallel to a plane arrangement direction of the plate-shaped battery cells (210, 220), and the fastening parts are suitable for fastening to a device by bolts, nuts, a rivet or hook structure.