Fixing device and image formation apparatus

A fixing device that fixes an unfixed image formed on a recording sheet, the fixing device comprising:

• a fixing roller that is elastic and rotates with a surface thereof heated;
• a fixing belt that is brought into pressure-contact with the surface of the fixing roller;
• and
• a pressing member that presses an inner circumferential surface of the fixing belt to bring the fixing belt into pressure-contact with the surface of the fixing roller so as to allow the fixing belt to revolve according to the rotation of the fixing roller, and form a fixing nip portion between the fixing belt and the fixing roller, wherein
• the pressing member has an opposing surface opposing the inner circumferential surface of the fixing belt and including a pressing area that presses the surface of the fixing roller via the fixing belt,
• part of the pressing area in each end portion of the opposing surface in an axis direction of the fixing roller is smaller than part of the pressing area in a central portion of the opposing surface in the axis direction,
• an edge of the opposing surface located downstream in a recording sheet conveyance direction projects downstream in the recording sheet conveyance direction such that a central portion of the edge is located further downstream than each end portion of the edge,
• the central portion of the opposing surface presses the surface of the fixing roller via the fixing belt such that the surface of the fixing roller makes contact with the fixing belt along a tangent line of the fixing roller, and
• the edge of the opposing surface is formed in a V shape such that a portion between each of the end portion of the edge and the central portion of the edge extends straight.