A method of forming a spacer of double glazing according to the present invention that forms a spacer by applying a spacer forming material from an applicator head for applying the spacer forming material while the applicator head is being moved by a multi-joint robot along the periphery of the upper surface of one glass plate. The spacer forming material is discharged form the discharge port of the application head in the linear regions of the periphery, and discharging of the spacer forming material is stopped form the discharge port of the application head in the corner regions of the periphery. During stopping of the discharge, the application head is rotated to change the direction of the discharge port to a direction suitable for application in the next linear region that follows the corner region.