Patent ID: 8157356

Claim:
An ink jet printing head comprising: a plurality of printing element substrates, in each of which a plurality of ejecting openings for ejecting ink, printing elements for generating ejecting energy for ejecting the ink, and an ink supply opening for supplying the ink to the ejecting openings are formed; a support member which supports the printing element substrates and includes a plurality of ink introduction openings for supplying the ink to the ink supply openings; and an ink supply member which is bonded to the support member and includes an ink storage chamber for storing the ink and an opening for supplying the ink stored in the ink storage chamber to at least one of the ink introduction openings, wherein the support member is formed of a first member in which at least one of the ink introduction openings is formed and a second member which is made of a material different from that of the first member and having a coefficient of linear expansion that is greater than a coefficient of linear expansion of the first member and is integral with the first member so as to surround the first member, and the support member and the ink supply member are bonded in such a manner that bonding faces of the first member and the second member, and the second member are not in contact with the opening.