A toner conveying device includes a toner conveying portion having vertical and horizontal conveying portions, a conveying member arranged in the horizontal conveying portion, a toner loosening member, and first and second magnetic members. The toner loosening member is arranged in the vertical conveying portion to be movable vertically. The first magnetic member is attached to the bottom end of the toner loosening member. The second magnetic member is attached to a part of the conveying member facing the toner loosening member. The magnetic pole of the first magnetic member on its side facing the conveying member is the same as the magnetic pole of the second magnetic member on its side facing the toner loosening member. The toner loosening member vertically reciprocates as the repulsive magnetic field between the first and the second magnetic members changes periodically with the rotation of the conveying member.