The invention relates to a cooling device for vehicle electrical equipment. Exhaust air of a cooling fan (2110) of a motor battery from exhaust air flow absorbed by a vehicle traveling battery is scattered in direction to a ventilation opening (10100) arranged in a first beam (10000) as indicated in arrows C(10), C(11) and C(12), or scattered in direction to a first ventilation pipe (12100) arranged in a buffering material (12000) and to a second ventilation pipe (13100) arranged in a buffering material (13100) as indicated in arrows C(20), C(21) and C(23), or scattered in direction to a second ventilation opening (12200) in the buffering material (12000)and a second ventilation pipe (13200) in the buffering material (13100) as indicated in arrows C(30), C(31) and C(33). With such structure, the invention is capable of avoiding local temperature increment in vehicle without a larger space even when air flows from the vehicle traveling battery.