A developing apparatus includes a developer carrying member for carrying a developer; and a magnetic member including a plurality of magnet pieces disposed inside the developer carrying member along a circumferential direction of the developer carrying member. The magnetic member includes one or more first magnet pieces having the same magnetic polarity at a surface opposing an inner surface of the developer carrying member, and one or more second magnet pieces having the other magnetic polarity opposing the inner surface of the developer carrying member. A total sum of the first magnet pieces is larger than a total sum of the second magnet pieces, and a ratio of the total sum of a volume of the first magnet pieces to a space occupied by the magnetic member is smaller at an end portion than in a central portion with respect to a longitudinal direction of the magnetic member.