Imaging apparatus

An imaging apparatus which is mountable in a vehicle comprising:

• an imager substrate on which an image sensor is mounted;
• a housing which has a plate-like rear wall extending in an in-plane direction perpendicular to a thickness-wise direction of the imager substrate, the housing having the imager substrate disposed therein;
• and
• a heat dissipator which is arranged within a gap between the imager substrate and the rear wall in contact with the imager substrate and the rear wall to release heat from the imager substrate to the rear wall, wherein
• the rear wall has a substrate-facing surface which faces the imager substrate through the heat dissipator, the rear wall being equipped with a retainer, the retainer is configured to hold the heat dissipator on the substrate-facing surface and inhibit the heat dissipator from flowing downward and out of the gap along the in-plane direction,
• the retainer includes grooves defined by convexities and concavities, and
• the heat dissipator is made of a viscoelastic material having a viscosity of 100 to 1,000 Pa·s at −10° C. to 70° C.