THERMAL PRINTER

A thermal printer (1), includes: a head unit (5) including a thermal head configured to perform printing on a recording sheet (100); a platen unit (4), which includes a platen roller (33) configured to convey the recording sheet (100), and is separably combined with the head unit (5); a printer main body (2), which has a recording-sheet receiving portion (10) configured to receive the recording sheet (100), and has the head unit (5) mounted thereto; a printer cover (3), which has the platen unit (4) mounted thereto, and is coupled to the printer main body (2) so as to be pivotable; and a separator (80), which is provided in the recording-sheet receiving portion (10), and is configured to separate parts of the recording sheet (100), which is rolled into a roll shape around a core body (101), folded on each other at a rolling start portion (102), which is rolled around the core body (101) and has a turn-back shape. 热敏打印机具备：头单元，其具有对记录纸印字的热敏头；压纸单元，其具有运送记录纸的压纸辊，可分离地组合于头单元；打印机主体，其具有容纳记录纸的记录纸容纳部，并且安装有头单元；以及打印机盖，其安装有