BUS BAR MODULE

It is an object of the present invention to prevent a temperature of a bus bar (10) from being raised excessively in a bus bar module (1) for a battery pack. A first vent hole (11) and a second vent hole (73) are formed in a portion surrounding each of hollow portions in bus bar housing portions (20) in the bus bar (10), a surrounding portion (21) and a cover member (70). The first vent hole (11) and the second vent hole (73) form an air flow path communicating from an upstream side to a downstream side in a predetermined air cooling direction (R1). In the case in which the air cooling direction (R1) is a direction in which an electrode (81) is extended from a battery cell (8), the first vent hole (11) is formed in a portion positioned in a clearance between the adjacent battery cells in each bus bar (10) and the second vent hole (73) is formed on the cover member (70).