Patent ID: 8531513

Claim:
An assembly method for an endoscope image pickup unit including: a distal end portion main body portion including a front opening portion, a side opening portion, and a rear opening portion functioning as opening portions respectively opened to a front, a side, and a rear and an arrangement space portion that communicates with the three opening portions; a lens section including a distal end lens having an outer diameter that generally fits in the front opening portion; and an image pickup section that fits in the rear opening portion and includes an image pickup device arranged in an image forming position by the lens section or an image pickup device arranged in an image forming position by the lens section and a rear lens section arranged to be integrated with the image pickup device in a rear of the lens section, the assembly method comprising: an inserting step for inserting the lens section into the arrangement space portion from the side opening portion; a fitting step for fitting the lens section, which is inserted into the arrangement space portion, in the front opening portion that communicates with the arrangement space portion; and an image pickup section fitting step for fitting the image pickup section in the rear opening portion from a rear of the rear opening portion.