An image pickup apparatus for an endoscope includes an exterior member configured to maintain an internal portion in an airtight manner, the exterior member being formed of one-layer metal, an internal unit provided in the internal portion of the exterior member, the internal unit including an image pickup unit, a fixing frame provided in the internal unit, the fixing frame being formed of metal and including at least one fixing portion 120r, 1201 configured to retain the internal unit and to fix the internal unit to an inner surface 17n of the exterior member, and a washer 65r, 651 provided between the at least one fixing portion 120r, 1201 and a screw hole 16r, 161 of the inner surface 17n, the washer 65r being formed of a member with a lower thermal conductivity than metal.
