| 摘要 |
An ink jet recording head is constituted by a plurality of recording element substrates each including at least one nozzle array having a plurality of nozzles for ejecting ink and heat generating resistors for ejecting the ink by thermal energy, a common liquid chamber having an introducing port for supplying the ink to the nozzles and a discharging port for discharging the introduced ink outside the ink jet recording head, and a supporting member on which the recording element substrates are mounted and in which a plurality of individual liquid chambers for supplying the ink to associated ones of the recording element substrates and a plurality of ink inlet ports for supplying the ink from the common liquid chamber to associated ones of the individual liquid chambers are formed. The individual liquid chambers are arranged in a direction of flow of the ink flowing from the ink introducing port toward the discharging port. At least in an upstreammost individual liquid chamber with respect to the direction, a center line of an associated inlet port with respect to the direction is located downstream of a center line of with respect to the direction.
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