Abstract: A method and apparatus for assembling an information signal on a rotary recording medium comprising a pre-recorded track recorded with pre-recorded information signals and an unrecorded track not recorded with information signals by use of a light beam in which an information signal to be newly recorded on the rotary recording medium is recorded continuously from the pre-recorded information signal already recorded on the pre-recorded track. The apparatus by use of a light beam searches for a pre-recorded track turn which is a portion of the pre-recorded track immediately preceding the unrecorded track and continuously reproduces the information signal from the searched pre-recorded track turn as it waits for a command signal commanding the recording of the information signal to be recorded.