A reproducing means for performing reproduction processing on digital data which is read out from a predetermined recording medium recording the digital data, a manipulating means for making an instruction of reproducing the digital data inserted in the recording medium, a control means for reading the digital data from the recording medium in accordance with the reproduction instruction input with the manipulating means and sending it to the reproducing means, and for controlling the reproducing means to perform reproduction processing on the digital data, and a cylindrical case for containing the reproducing means and the control means are provided, and wherein the manipulating means is provided on one end side on one plane in the longitudinal direction of the cylindrical case. Thereby the user can manipulate the manipulating means without taking out a portable recording and/or reproducing device from a bag or a pocket, thus making it possible to remarkably improve its manipulation.