A powder sensing device includes: a housing formed of a transparent member and having powder housed therein; and a light transmission-type sensor capable of sensing that powder is housed in the housing, the light transmission-type sensor including a light emitting unit and a light receiving unit, the light transmission-type sensor being provided such that at least a part of the housing is disposed between the light emitting unit and the light receiving unit. The housing has a light incident surface, a light emission surface and an adjacent surface provided adjacent to the light emission surface. The adjacent surface extends so as to be farther away from an optical axis that connects the light emitting unit and the light receiving unit as the adjacent surface is closer to the light emission surface in a direction of the optical axis that connects the light emitting unit and the light receiving unit.