Fixing device and printer

The utility model relates to the technical field of printers, in particular to a fixing device and a printer, and aims to solve the problem that a heat source of a fixing device is easy to damage and break. The fixing device provided by the utility model comprises a heat source assembly, a first connecting part, a second connecting part and a fixing bracket, the heat source assembly includes a heat source body for curing a toner image on a print medium; one end of the heat source body is connected with the first connecting part and the other end is connected with the second connecting part; the first connecting part is connected with the fixing bracket, and the second connecting part is movably connected with the fixing bracket; the second connecting part is configured to move in the direction pointing to the first connecting part or deviating from the first connecting part. According to the fixing device provided by the utility model, the second connecting part is movably connected with the fixing bracket an