Fixing device and image forming apparatus

A fixing device configured to fix a toner image on a recording medium, comprising:

• an endless fixing belt;
• a pressing member that is disposed inside the inner periphery of the fixing belt and includes a counter face that faces the inner peripheral surface of the fixing belt;
• a pressing rotator that is disposed to face the pressing member with the fixing belt interposed therebetween and configured to form a fixing nip with the pressing member;
• and
• a heating unit configured to heat the fixing belt,
• the counter face including a curved portion that is concavely curved and an extended portion that is continuous with the curved portion and is provided at the downstream of the curved portion in the conveying direction of the recording medium,
• the shape of the curved portion in a cross section of the pressing member orthogonal to the width direction of the fixing belt being configured to approach the center of the pressing rotator as it extends toward the downstream in the conveying direction, and
• the shape of the extended portion in the cross section being configured to leave away from the center of the pressing rotator as it extends toward the downstream in the conveying direction.