To provide a method of improving the positional accuracy of a reinforced mat for reinforcement, fixing the reinforced mat for reinforcement firmly until concrete is cured and hardened, and smoothly pulling out an ALC (autoclaved lightweight concrete) panel and the reinforced mat for reinforcement without damaging them after the concrete is cured and hardened.

This cap-type set spacer includes a cap inserted in an arrowhead part at the tip of a set pin to hold the set pin, and a grip for gripping a set spacer of the reinforced mat for reinforcement. The cap is formed of a cup of inverted cone shape having inner dimensions equal to outline dimensions of the arrowhead part at the tip of the set pin in use, and the grip is formed to extend two upper ends of an opening toward the upper part of the opening in facing positions with the opening of the cap held between. Receiving parts and protrusions for gripping the set spacer are formed at tips of the grip.