An image forming apparatus includes a container configured to contain two-component developer including toner particles and carrier beads. The image forming apparatus further includes a developer carrying member configured to carry thereon the two-component developer and having a magnetic field generating member and a plurality of grooves having a generally V-like shape satisfying h.gtoreq.50+R/2+{(R/2)/sin(.theta./2)}, in which h represents a depth of the grooves, .theta. represents an opening angle of the grooves, and R represents a volume-average diameter of the carrier beads.