To easily draw monospaced lines on an object surface of a ground, etc., and to correctly and efficiently draw the monospaced lines.

An auxiliary apparatus 10 for lining is the device for obtaining the monospaced lines such as lines for lanes on the object surface of the ground, etc. The apparatus 10 comprises: a main body 11 having an elongate shape, extending in a direction across the lanes, with a drawing part 20 for drawing the lines on the object surface G arranged therein at every prescribed width; and wheels 30 for supporting and moving the main body 11. The main body 11 includes: an operation device 34 for moving the main body 11; and attachment parts 33, 36 for extending tools 35 to be extended from the main body 11 toward the center of a circular motion by the motion.