The inveniton relates to an electrostatic capacity type encoder which includes a rotary disk rotatingly provided on an encoder body, and a first stationary disk and a second stationary disk fixed to the encoder body to face each other with the rotary disk arranged therebetween. Transmitting electrodes, receiving electrodes, coupling electrodes and output electrodes are provided on said disks respectively, in which the transmitting electrodes are applied alternating currents with respective different phases, and the amount of rotating displacement in the rotary disk is detected in accordance with the electric signal which changes with the rotation of the rotary disk. The encoder can be used in measures such as micrometer, tiny-measuring device, and the like, and can reduce the volume of said mearures, enhance the precision. |