Developer-agitating transporter, developing device, and image forming apparatus

A developer-agitating transporter comprising:

• a plurality of helical blades that helically extend around a rotation shaft, the plurality of helical blades being arranged at different positions in a direction perpendicular to a longitudinal direction of the rotation shaft;
• and
• a gap portion that divides each of the plurality of helical blades into a first blade portion and a second blade portion so that the helical blade is discontinuous in a direction in which the helical blade extends, the first blade portion and the second blade portion opposing each other across the gap portion,
• wherein the gap portion causes the first blade portion and the second blade portion to be arranged at a certain angular interval in a circumferential direction of the rotation shaft, and
• wherein at least one surface of adjacent ones of the helical blades that are adjacent in the circumferential direction of the rotation shaft has a sloped area that is sloped at an angle that changes with respect to an axial direction of the rotation shaft.