Fixing device and image forming apparatus

A fixing device, comprising:

• a fixing belt that is endless and that is rotatable along a conveying direction of a recording medium;
• a pressing member that makes contact with an outer circumferential face of the fixing belt to give the fixing belt a rotating driving force;
• a nip forming member that is disposed inward of the fixing belt so as to face the pressing member across the fixing belt and that makes contact with an inner circumferential face of the fixing belt to form a fixing nip portion;
• a belt guide that makes contact with the inner circumferential face of the fixing belt at other than the nip portion to support the fixing belt from inward;
• and
• a frame member that holds the nip forming member and the belt guide,
• wherein
• the belt guide has:
• a fastening portion that is fastened to the frame member at one side of the fixing nip portion in a belt rotation direction;
• an arc portion that extends from the fastening portion while curving in an arc shape along the inner circumferential face of the fixing belt and that has an elastic force acting outward in a radial direction;
• and
• a contact portion that extends from one end of the arc portion in a circumferential direction at another side of the fixing nip portion in the belt rotation direction toward the frame member and that has a counter-face facing an inner circumferential face of the arc portion, and
• the frame member has a regulating portion that extends toward the belt guide to make surface contact with, so as to overlap, the counter-face of the contact portion.