A push-up member of this image generating apparatus includes a first push-up member integrally having a first assembly engaging portion provided between a first spring clip portion and a first engaging portion and a second push-up member integrally having a second assembly engaging portion rotatably engaging with the first assembly engaging portion, and the first engaging portion and the second engaging portion are engaged with each other in assembling by engaging the first assembly engaging portion and the second assembly engaging portion with each other while mounting first and second ends of a spring member on the first push-up member and the second push-up member respectively and rotating the second push-up member about the engaging position between the first assembly engaging portion and the second assembly engaging portion against urging force of the spring member.