To prevent defective sensitivity for a transmission reception radio wave by folding a lower part of an antenna element in the direction apart from the face of the user or the like and tilting the antenna element in the same direction when the element is extracted from a support hole.

When an element 30 of an antenna 21 is drawn out from a case 22 and fixed, the element is tilted in a direction apart from the head or face of the user around a base. The antenna element 30 is provided with a element main body 30 made of a material easily elastically formed and whose cross section is flat, large diameter fixed sections 31, 32 provided respectively to an upper and a lower part of the main body 30, and a sleeve stopper 33 or the like integrated with a lower end of the fixed part 32. The element 30 is formed in advance to be tilted at a prescribed angle to a border with the fixed part 32 and when the element 30 is contained in the case 22, the bent part is deformed into a straight line.