Patent ID: 8862001

Claim:
An image forming apparatus, comprising: a first image bearing member; a second image bearing member; a developing device for forming a toner image on the basis of an electrostatic latent image formed on said first image bearing member; electrostatic latent image forming means for forming an electrostatic latent image mark on said first image bearing member; detecting means for detecting a position of the electrostatic latent image mark; and an adjusting portion for adjusting, on the basis of a detection result of the position of the electrostatic latent image mark, superposition between the toner image formed on said first image bearing member and a toner image formed on said second image bearing member, wherein an electrostatic latent image which is undetectable by said detecting means is formed between a formation region of the toner image on said first image bearing member and a formation region of the electrostatic latent image mark on said first image bearing member.