An inkjet printer includes: a print execution unit that executes printing; and a controller that controls the print execution unit. The controller is configured to: determine whether a type of ink supplied by the ink supply unit is changed; determine whether to use a residual ink which is ink before change remaining in the ink flow path in response to be determined that the type of the ink is changed; control the print execution unit to execute new printing using the residual ink in response to be determined to use the residual ink for the printing; and execute a discarding process for discarding the residual ink before the new printing is performed in response to be determined to not use the residual ink for the printing.