IMAGE FORMING DEVICE

There is provided an image forming apparatus capable of suppressing lowering in the fixing property of a toner image with respect to a print medium due to the temperature of the environment in which the image forming apparatus is installed. A toner image forming section 4 forms a toner image in a print medium S. The toner image forming section 4 has an image carrier 6 and a transferring section 10. A fixing section 5 fixes the toner image to the print medium S by applying a fixing solution to the print medium S which has been conveyed thereto by the image carrier 6 and the transferring section 10. A heater 23 heats the print medium S which has passed the fixing section 5. A temperature sensor 22 measures a temperature inside a body casing 2. In a case that a temperature T measured by the temperature sensor 22 is higher than a predetermined threshold value T1, a controller 25 controls the image carrier 6 and the transferring section 10 so as to make a conveying velocity of the print medium S to be a first conveying velocity. Further, in a case that the temperature T is lower than the threshold value T1, the controller 25 controls the image carrier 6 and the transferring section 10 so as to make the conveying velocity of the print medium S to be a second conveying velocity slower than the first conveying velocity.