To provide lens-fitted photo film units capable of housing batteries of different sizes, respectively, inexpensively.

A lens-fitted photo film unit 12 is fabricated by attaching an exposure unit 26, a flash unit 27, etc., to a main body portion 29 and fixing a front cover 30 and a rear cover 31. The main body portion 29 has supporting projections 35, 36 formed integrally therewith. The flash unit 27 has a positive contact member 48 and a negative contact member 49 connected thereto. When a shorter battery 66 is housed in the lens-fitted photo film unit 12, the battery 66 is nipped between the positive contact member 48 and the negative contact member 49 by way of a connection member 70, and then the battery 66 is held between the supporting projections 35, 36.