Patent ID: 8190054

Claim:
An image forming apparatus, comprising: a structure frame that includes a first upright panel and a second upright panel, the structure frame forming a skeleton of the image forming apparatus; a first unit holder that is attached to the first upright panel; a plurality of first engaging members that extends in a first direction and provided on any one of the first unit holder and the first upright panel; a plurality of second engaging members that engages with the plurality of first engaging members with substantially no play in a second direction other than the first direction and provided on other one of the first unit holder and the first upright panel; a detachable unit that is positioned and held by the first unit holder between the first upright panel and the second upright panel; and a position adjusting member that engages with the first unit holder at an engaging position and that is to be operated to move the first unit holder in the first direction relative to the structure frame for position adjustment, the engaging position being on a vertical line extending through a center of mass of the detachable unit, wherein the center of mass of the detachable unit lies on a plane corresponding to: a first vertical line defined by an upper engaging member and a lower engaging member, both set of engaging members being provided on the first upright panel; and a second vertical line defined by an upper engaging member and a lower engaging member, both set of engaging members being provided on the second upright panel.