A battery pack including a cell having a surface including a coupling groove, a circuit board electrically connected to the cell, a coupling member coupled to the cell, having one end coupled to the circuit board and another end having a coupling hole corresponding to the one coupling groove, a cover surrounding the circuit board, mounted on one surface of the cell, and having a through-hole, a screw coupled to the coupling groove through the through-hole, and an elastic supporting member disposed between a head part of the screw and the coupling member.