According to the present invention is insulation for a water meter, the insulation is formed by integrally bonding a plurality of the body and then forming the air layer inside the insulation body, the water meter forming a check through-hole for the center of the insulation, the through-hole to form a lid for opening and closing a transparent body, the outer periphery of the insulation is to form a contact projection for the support is in close contact with the inner wall of the water meter bohotong elasticity the insulation outer periphery of the insulation is to form ssuiwoseo the shrink film, the lower portion of the lagging claim that if the supporting water meters are installed elastic the lagging one insertion port and the on-off valve is interposed the second insertion opening and the water pipe is fitted to form a janghom for elastically supporting the insulation, insulation withdrawal withdrawal handle for the upper portion of the insulation to support resilient the lagging to provide an insulation for the water meter is provided with an air layer, characterized in that forming includes a hameu As, raises the thermal effect water meter the insulation even when the water meter protective trough rain water flowing into the rainy season to ensure that by the buoyancy not become the water meter bohotong image side, and an effect of easily by reducing the water meter cost of managing the insulation fitting operation occurs It is designed for insulation on.