| 摘要 |
In an ink jet recording head which can discharge ink droplets having different discharge amounts, stabilization of the ink discharge amount is efficiently achieved without upsizing and cost increase. In the ink jet recording head of the invention, three ink supply ports are provided in a recording element substrate. For a cyan ink discharge unit and a magenta ink discharge unit which are located on both side portions of a recording element substrate, a nozzle array having a large ink discharge amount and a nozzle array having a small ink discharge amount are provided across the ink supply port, and a temperature control sub-heater is arranged near the nozzle array having the small ink discharge amount.
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