An imaging apparatus includes: a board; a recording medium accommodation portion provided on the board and configured to removably accommodate a recording medium; a radiator plate provided at a position away from the recording medium accommodation portion; a thermal conductive sheet including a first portion fixed to the radiator plate and a second portion in contact with the recording medium accommodation portion; a cushion member configured to urge a second portion of the thermal conductive sheet toward the recording medium accommodation portion and to maintain contact between a second portion of the thermal conductive sheet and the recording medium accommodation portion; and a cushion member support member configured to support the cushion member.