An image pickup element package according to an embodiment of the present technology includes a solid-state image pickup element, a circuit board, a translucent substrate, and a support. The solid-state image pickup element includes a light-receiving surface, and a back surface on a side opposite to the light-receiving surface. The circuit board supports the back surface of the solid-state image pickup element. The translucent substrate is opposed to the light-receiving surface. The support includes a resin frame portion and a conductor portion and is disposed between the circuit board and the translucent substrate. The resin frame portion includes a hollow portion that houses the solid-state image pickup element, and a fixation portion that is fixed to a casing portion of an image-pickup device. The conductor portion is integrally provided in the resin frame portion and provides thermal connection between the circuit board and the fixation portion.