PURPOSE: To provide a battery frame having a cooling air introducing structure without infiltrating a splash further with a duct layout simplified.

CONSTITUTION: A suction port 12 and an exhaust port 13 are provided in a rear end part of a battery frame 1, to right/left partition inside the battery frame 1 into a forward path 15 and a return path 16 by a partitioning wall 14, also to provide a communication path space 17 in a front side part, and a turn flow passage 18 of the outside air is formed. From the suction port 12 in the rear end part where no direct hit of a splash is generated, the outside air is taken in to make a turn flow in the battery frame 1, to be discharged to the outside from the exhaust port 13. In this way, infiltrating a splash is avoided, and a battery B can be well cooled.