Secondary battery module and connector

Provided are a secondary battery module to allow a connection tool for terminals to be installed even if the distance error between unit batteries is generated, and a connection tool used in the secondary battery module. The secondary battery module comprises a plurality of layered unit batteries(11); and a connection tool(20) which connects the each unit battery electrically, wherein the both ends of the connection tool are engaged with the terminals of the unit battery and the connection tool is axis-combined so as to be allow the central part to be rotated. Preferably the central part of the connection tool is cut so as to allow the connection tool to be separated into two members(21,22), and the two members can be rotated mutually.