Lens-fitted photo film unit and electronic flash device for use therewith

A lens-fitted photo film unit, in which a film housing is pre-loaded with unexposed photo film, said film housing including a photograph-taking device including a taking lens and a shutter mechanism, said flash device including a flash-emitting section driven in response to actuation of said shutter mechanism for emitting flash light toward a photographic field within a predetermined range, a main capacitor for storing charge to be discharged in said flash-emitting section, and a flash circuit board having a flash circuit for controlling charging of said main capacitor and flash emission of said flash-emitting section,

• wherein said flash-emitting section is slidably attached to said flash circuit board, said flash-emitting section including two rails arranged parallel to one another, said flash circuit board including a projecting portion, said flash-emitting section and said flash circuit board being arranged such that said rails are slidably disposed on opposite sides of said protecting portion.