NOVELTY - The component pack (10) has a pack case formed with a communicating hole that is utilized for connecting a space and an exterior space (120) of the pack case. Another communicating hole is formed in a partition of vicinity of the former communicating hole, and connects another space and the former space. A closure part occludes the communicating holes. A cover removal-preventing part (162) is extended from a base part of a cover outer side rip part (161) and hooked in an inner surface (53b) of a workpiece hole cover (53).    USE - Electrical component pack i.e. waterpouring structure integrated electrical component pack, for accommodating electrical components such as battery and power drive unit (PDU), of a vehicle (claimed) i.e. electric vehicle. Can also be used for a hybrid vehicle.    ADVANTAGE - The closure part occludes the communicating holes, so that spaces can be reliably isolated, quality of the component pack can be ensured and troublesome of the component pack can be suppressed. The component pack suppresses increase in manufacturing cost and weight. The component pack is provided with a waterpouring structure, so that water-pouring to the spaces can be ensured. The component pack easily performs attachment removal of the communicating holes. The pack simple forms shape of the closure part. The component pack cools battery for drive by supplying cooling air to a cooling path.    DETAILED DESCRIPTION - The communicating holes are a work-piece hole cover filling port (140) and a cooling air path filling port (150). The spaces are a cooling outer space (100) and a cooling space (90). The partition is a cooling air path (110). The closure part is a filling port plug (160) that is made of elastic bodies such as resin.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of an electrical component pack.    Electrical component pack (10)    Workpiece hole cover (53)    Inner surface of workpiece hole cover (53b)    Cooling space (90)    Cooling outer space (100)    Cooling air path (110)    Exterior space (120)    Work-piece hole cover filling port (140)    Cooling air path filling port (150)    Filling port plug (160)    Cover outer side rip part (161)    Cover removal-preventing part (162)