Fixing device and image forming apparatus

A fixing device comprising:

• a fixing member configured to heat toner on a medium with rotating around an axis thereof;
• a pressing member configured to, with rotating around an axis thereof, form a pressing area with the fixing member and to press the toner on the medium passing through the pressing area;
• and
• a heat source configured to be provided corresponding to the pressing area across the fixing member and to heat the fixing member,
• wherein the heat source includes:
• a heat insulation layer configured to be laminated on a base material and to have a convex part that protrudes toward the fixing member;
• and
• a heating and contacting part configured to be laminated on the heat insulation layer that has the convex part and to contact to an inner surface of the fixing member so as to heat the fixing member, and
• wherein the convex part protrudes the heating and contacting part laminated thereon toward the fixing member so as to maximize pressure in the pressing area.