Patent ID: 8622517

Claim:
A method of manufacturing a liquid ejection head including a base member having a liquid supply port row including a plurality of liquid supply port portions for supplying liquid formed in the longitudinal direction, and a plurality of liquid ejection devices arranged at positions corresponding to the liquid supply port portions and bonded to the base member with an adhesive agent, the method comprising: defining a first imaginary reference line along the longitudinal direction of the base member and measuring the distances between the first imaginary reference line and at least two liquid supply port portions of the liquid supply port row; defining a second imaginary reference line passing through the liquid supply port portion at the shortest distance from the first imaginary reference line and the liquid supply port portion at the longest distance from the first imaginary line respectively from among the at least two liquid supply port portions and defining the second imaginary reference line between two imaginary lines parallel to the first imaginary reference line; applying the adhesive agent on the base member on the basis of the second imaginary reference lines; and bonding the liquid ejection devices on the base member with the adhesive agent applied on the base member.