A secondary battery pack comprising: a battery cell having an anode terminal and a cathode terminal formed at one face having a sealed surplus portion; and a protection circuit module electrically connected to the battery cell via the anode terminal and the cathode terminal, wherein the PCM comprises: a protection circuit board being provided with an anode terminal connection part and a cathode terminal connection part connected to the anode terminal and the cathode terminal, respectively; and a PCM case configured to receive the PCB through an open face thereof so that the PCM case surrounds the PCB, the PCB is coupled to the anode terminal and the cathode terminal of the battery cell via the anode terminal connection part and the cathode terminal connection part, the PCB is disposed in the PCM case in a state in which the PCB is parallel to the battery cell, and the PCM case, in which the PCB is disposed, is mounted to the sealed surplus portion of the battery cell, and the PCM further comprises an electrically insulative lid to close the open face of the PCM case, wherein the secondary battery pack further comprising an insulative tape additionally attached to an electrode terminal exposure region of the sealed surplus portion, wherein the anode terminal connection part and the cathode terminal connection part respectively include a part coupled to the PCB and an extension part that can be bent when the anode terminal connection part and the cathode terminal connection part are connected to the anode terminal and the cathode terminal of the battery cell, respectively. a battery cell having an anode terminal and a cathode terminal formed at one face having a sealed surplus portion; and a protection circuit module electrically connected to the battery cell via the anode terminal and the cathode terminal, wherein the PCM comprises: a protection circuit board being provided with an anode terminal connection part and a cathode terminal connection part connected to the anode terminal and the cathode terminal, respectively; and a PCM case configured to receive the PCB through an open face thereof so that the PCM case surrounds the PCB, a protection circuit board being provided with an anode terminal connection part and a cathode terminal connection part connected to the anode terminal and the cathode terminal, respectively; and a PCM case configured to receive the PCB through an open face thereof so that the PCM case surrounds the PCB, the PCB is coupled to the anode terminal and the cathode terminal of the battery cell via the anode terminal connection part and the cathode terminal connection part, the PCB is disposed in the PCM case in a state in which the PCB is parallel to the battery cell, and the PCM case, in which the PCB is disposed, is mounted to the sealed surplus portion of the battery cell, and the PCM further comprises an electrically insulative lid to close the open face of the PCM case, wherein the secondary battery pack further comprising an insulative tape additionally attached to an electrode terminal exposure region of the sealed surplus portion, wherein the anode terminal connection part and the cathode terminal connection part respectively include a part coupled to the PCB and an extension part that can be bent when the anode terminal connection part and the cathode terminal connection part are connected to the anode terminal and the cathode terminal of the battery cell, respectively.