To obtain a recorder employing a bubble jet (R) recording system in which ink can be sustained constantly in a state suitable for ejection in the vicinity of an ejection opening without performing a preliminary ejection leading to interruption of recording operation.

An electrothermal converter Rh provided in each nozzle of a recording head is conducted by a predetermined energizing means 313, 312, 330 and ink in each nozzle is bubbled by thermal energy generated from the electrothermal converter Rh. An ink drop is made to flow from each nozzle by the bubbling pressure and recording is performed. When ink is not made to flow from each nozzle for a predetermined time or longer, the energizing means energizes the electrothermal converter Rh to previously supply ink in the nozzle with thermal energy not causing to fly the ink thus bubbling the ink.