A sheet feeding device includes a setting roller, a motor, a flag, a setting guide, a setting-guide swinging device, and a locking mechanism. The motor generates a driving force to rotate the setting roller. The flap swings between a standby position and a feeding position, and, when at the standby position, does not allow transport of a sheet. The setting guide swings between a standby position and a feeding position, and, when at the standby position, separates a sheet from the setting roller. The setting-guide swinging device swings the setting guide using the driving force from the motor. The locking mechanism prevents the flap from swinging to the feeding position when the flap and the setting guide are in the respective standby positions.