Development device, process cartridge, and image forming apparatus

A development device which is removably insertable into an image forming apparatus, the development device comprising:

• a housing configured to store developer;
• a developer carrying member configured to carry developer;
• a first conductive member having a first surface for use in detection of an amount of developer stored in the housing based on a change in electrostatic capacitance, the first conductive member extending in a longitudinal direction of the developer carrying member, the longitudinal direction being perpendicular to an insertion direction in which the development device is inserted into the image forming apparatus;
• a second conductive member having a second surface facing the first surface, the second conductive member extending in the longitudinal direction of the developer carrying member;
• a development contact point electrically connected to the developer carrying member;
• a first contact point electrically connected to the first conductive member;
• and
• a second contact point electrically connected to the second conductive member,
• wherein the first contact point is disposed on a more inner side than the development contact point in a perpendicular direction with respect to the insertion direction, and
• wherein the second contact point is disposed on a more inner side than the first contact point in the perpendicular direction with respect to the insertion direction.