To provide a key switch module capable of reducing metallic squeaking noises caused by a clicking operation and contact noises between a movable contact electrode and a fixed contact electrode by forming a part of the fixed contact electrode and the movable contact electrode as basic structural elements of a key switch or a part of a base board for mounting the key switch with a sound absorption member and attaining thinning of the whole key switch module.

In the key switch module 11 having the key switch provided with the base board 12, a fixed contact 14 formed on the base board 12, and a dome spring 15 for covering the fixed contact 14, the sound absorption member 17 made of anisotropic conductive rubber is arranged so as to cover the fixed contact 14.