An image-capture apparatus includes: an outer casing inside of which predetermined sections are arranged; an imaging device arranged inside of the outer casing; and a circuit board arranged inside of the outer casing, on which electronic components are mounted, the electronic components being heat generating elements. A heat-releasing air duct is formed on an outer surface side of the outer casing, at least an opening of the duct being formed at one surface of the outer casing and not communicating with an inside of the outer casing. Part of the outer casing is provided as a duct forming part that forms the heat-releasing air duct. Heat generated by the electronic components mounted on the circuit board is conducted to the duct forming part to be released outside of the outer casing from the heat-releasing air duct.