The invention provides a note thermal printer which comprises a machine base, a motor, a transmission gear set, a print head assembly, a support and a rubber roll. One end of the support is arranged on one side of the machine base in an overturning mode and opposite to the print head assembly. The other end of the support is connected with the machine base through a detachable mechanism. The note thermal printer is characterized in that the side, close to the support, of the machine base is provided with a limiting block; the detachable mechanism comprises a wrench, a limiting sliding piece and a reset spring, one end of the wrench is arranged on the support in a rotating mode, and the other end of the wrench is a wrench portion; the limiting sliding piece can be arranged on the support in a sliding mode, one end of the limiting sliding piece is connected with the wrench and can be driven by the wrench to move back and forth, the other end of the limiting sliding piece extends outwards to form an extension portion capable of being matched with the limiting block to position the support. Compared with the prior art, the note thermal printer has the advantages that the wrench is pulled, the limiting sliding piece is pulled while the elastic force of the reset spring is overcome, the limiting sliding piece is separated from the limiting block, one side of the support is separated from the machine base, the rubber roll is separated from the print head assembly after the support is turned over, disassembly and assembly of printing paper can be achieved, and the note thermal printer is convenient and fast to use, simple in structure and easy to manufacture.