A vehicle slide door temporary setting jig includes a door position holding mechanism for holding a slide door in a desired angular position relative to a vehicle body. The door position holding mechanism has an end extension of one link lever of a linkage projecting beyond an associated link pin, an arcuate guide member pivoted to the free end of an attachment frame and configured to define a path of movement of a tip end portion of the end extension as the link lever turns about the link pin, and a resilient member acting between the free end of the attachment frame and the arcuate guide member and resiliently urging the arcuate guide member against the tip end portion of the end extension.