Image forming apparatus

An image forming apparatus comprising:

• an image carrying member in which an electrostatic latent image is formed on an outer circumferential surface;
• a development device that includes a developer carrying member which supplies a toner to the electrostatic latent image to form a toner image;
• a slide member that is capable of reciprocating in a longitudinal direction of the development device and removably supports the development device;
• an approach/separation mechanism that moves the slide member to a support position in which the slide member is located close to the development device and to a separation position in which the slide member is located away from the development device while moving the slide member in the longitudinal direction of the development device;
• a density sensor that is provided in the development device to detect a density of the toner in the development device;
• and
• a relay board that is provided in the slide member and is electrically connectable to the density sensor,
• wherein each of the development device and the slide member includes one of a locating pin and a locating hole that are fitted together when the development device and the slide member approach each other,
• the locating hole includes an opening inclined portion that is provided in an opening end portion and is inclined with respect to an axial direction of the locating hole and
• the locating pin includes:
• a tip inclined portion that is provided in a tip portion and is inclined with respect to an axial direction of the locating pin;
• and
• a locating inclined portion that is continuous in a circumferential direction of the tip inclined portion, is arranged opposite the opening inclined portion in the longitudinal direction of the development device and has a smaller inclination angle with respect to the axial direction than the tip inclined portion.