Image forming apparatus

An image forming apparatus comprising:

• a photosensitive body;
• a latent image forming unit to form a latent image on the photosensitive body;
• a developing device having a developing roller which supplies a developer to the latent image by sliding in a direction to connect/separate to/from the photosensitive body in a main body;
• a positioning member to maintain the developing device in an operable state in the main body;
• and
• a driving roller having an acting portion provided around a shaft in contact with the developing device for slidingly moving the developing device and a releasing portion that is formed by partially cutting the acting portion and not in contact with the developing device, to connect/separate the developing device to/from the positioning member by applying load to the developing device in a sliding direction in the main body and moving the developing device in a direction to separate from the photosensitive body;
• wherein the releasing portion is brought to face the developing device after releasing the developing devices from the positioning device, wherein the developing device is connected/separated to/from the main body from a front side of the main body that is orthogonal to the sliding direction.

An image forming apparatus comprising:

• a photosensitive body;
• a developing device having a developing roller which is slid in a direction to contact/separate to/from the photosensitive body and supplies a developer to the latent image;
• a positioning member to maintain the developing device in an operable state for development in a main body;
• a housing case for housing the developing device;
• and
• a housing case moving device which contacts the housing case, connects and releases the developing device to the positioning member by applying load in a sliding direction to the housing case and after connecting the developing device to the positioning member, moves the housing case and brings the developing device to contact/separate to/from the photosensitive body by sliding the housing case, wherein the developing device is connected or separated to/from the housing case from a front side of the main body that is orthogonal to the sliding direction.