Image forming apparatus with a reduced dimension in a horizontal direction

An image forming apparatus comprising:

• an annular belt that is wound around a plurality of rotating bodies including a driving roller and that moves along a circular path while having a plurality of linear portions each of which forms a different angle, which is an acute angle or an angle of zero degrees, with a horizontal direction when viewed in an axial direction of the driving roller;
• a plurality of first image forming bodies that are arranged along one of the linear portions in such a manner as to be spaced apart from each other by a first distance and that form images onto a formation target, the formation target being the belt or a recording medium transported by the belt;
• and
• a plurality of second image forming bodies that are arranged along another one of the linear portions, the other linear portion forming the angle larger than the angle formed by the one linear portion, in such a manner as to be spaced apart from each other by a second distance shorter than the first distance and that form images onto the formation target.