To enhance sealability between the inside of a housing and a storage space for an inverter.

A sealing terminal 51 is configured to insert a metal terminal 43 through the inserting hole 42a of a bolt 42 and use a first and second insulating members 44, 45 to insulate between the bolt 42 and the metal terminal 43. With a gasket 48 being arranged on a bottom wall 12a, the bolt 42 of the sealing terminal 51 is screwed into a female screw hole 41, so that the gasket 48 is pressed against the bottom wall 12a by the head part 422 to be elastically deformed and held between the bottom wall 12a and the head part 422.