Electrical storage module

An electricity storage module comprising:

• a stack formed of a plurality of power storage elements having positive and negative lead terminals that protrude outward from end portions thereof;
• a holder member made of an insulating resin and attached at least to an end portion of one of the power storage elements from which one of the lead terminals protrudes, the holder member being arranged to hold the one of the power storage elements;
• and
• a heat-transfer plate member disposed between two of the power storage elements that are adjacent in a stacking direction of the stack, the heat-transfer plate member being made of a heat conductive material configured to conduct heat generated by the two of the power storage elements to outside of the module,
• wherein an engaging portion is provided on one of the holder member and the heat-transfer plate member, and an engaged portion arranged to be engaged by the engaging portion is provided on the other of the holder member and the heat-transfer plate member,
• wherein the holder member and the heat-transfer plate member are integrated by mutual engagement of the engaging portion and the engaged portion, and
• wherein the holder member is formed with a slide portion on which the heat-transfer plate member is slidably mounted.