A development apparatus includes a developer bearing member which develops a latent image, a first room supplying developer to the developer bearing member, and a second room connecting to the first room via opening portions formed at both ends of the first room, with the first room and the second room forming a circulation passage circulating the developer. In addition, a partition wall partitions the first room and the second room, a replenishment passage connects outside of the circulation passage and replenishes the developer, and a discharge port discharges surplus developer from the development container. A replenishing screw is arranged in the replenishment passage and conveys developer in a replenishing port toward the circulation passage, and a ventilation port is formed at a replenishing port side outside of the circulation passage of the first room or the second room or inside of the replenishment passage.