An image forming apparatus includes an image carrying member, a transport belt, a driving roller, a transferring member, a nip portion, and an applying portion. The transferring member makes contact with the inner circumferential surface of the transport belt to press the transport belt against the image carrying member. The nip portion is formed between the transport belt and the image carrying member by the pressure of the transferring member. The applying portion applies a bias to the transferring member. Application of the bias to the transferring member causes, at the nip portion, the toner image carried on the image carrying member to be transferred to the recording medium carried on the transport belt. Near the nip portion, a pair of support members are arranged which keeps both width-direction end parts of the transport belt in contact with the image carrying member.