Abstract: An apparatus for transmitting electric power and information signals between a rotating element provided at a rotating shaft and a fixed element provided at the circumference of the rotating shaft. Both the rotating element and fixed element are configured as coils, and they perform transmission by an electromagnetic induction. Each coil is formed in a cylindrical form, and has a split structure comprising plural blocks which can be mounted on the shaft from the circumference of the rotating shaft. The rotating element and fixed element are mounted respectively on a rotating shaft of a machine and a fixed side of the machine, and electric power and information signals needed by the rotating element are transmitted from the fixed element.