To provide radio equipment for water meter capable of preventing an electronic circuit section, and the like, from breaking down or malfunctioning due to humidity.

A housing H containing a circuit board assembly 3 comprises a box-shaped upper case 5 and a lower lid 6, wherein the periphery of the lower lid 6 is coupled with the upper case 5 integrally so as to be firmly fixed by using an ultrasonic welding. A cable 2 is configured to pass through an opening 12 of the lower lid 6 and connect to the electronic circuit section of the circuit board assembly 3. Furthermore, a partition chamber S through which a portion of the cable 2 passes, is formed in the lower lid case 6, and a synthetic resin P is injected into the partition chamber S and brought to become hardened, thereby sealing it in a sealed state. Moreover, an external coat in a fixed area of the cable 2 that passes through the partition chamber S is peeled, thereby preventing any damp from entering the housing H.