1. A power conversion device comprising:a housing in which a power module is mounted;
a multi-phase output bus-bar having one end electrically connected to the power module and a remaining end penetrating the housing so as to be directly exposed to an outside; and a fixture,
the housing further including: a housing main body having an accommodation space with an open top side, the power module being provided in the accommodation space; and a cover for covering the open top side of the housing main body, the multi-phase output bus-bar penetrating the cover,
wherein the fixture is accommodated within the housing main body, the fixture serving to fix the multi-phase output bus-bar,
the fixture further having an upper end configured to be press-fitted into and fixed to a lower surface of the cover.