A reproducing apparatus reproduces a video signal of a certain system having a field frequency F1 and a number N1 of horizontal scanning lines within one field period which has been recorded on a magnetic tape travelling at a speed S1 along plurality tracks formed obliquely relative to the longitudinal direction of the tape and mutually parallel, converting the video signal to a video signal of another system having a field frequency F2 and a number N2 of horizontal scanning lines. The reproducing apparatus comprises a means for causing the tape to travel at a speed S2 which is represented by the equation S2=(F2/F1)S1, and a means for causing the rotary heads to trace each track on the travelling magnetic tape thereby utilizing a signal over tracing range of a length l2 substantially as a reproduced signal corresponding to unit field amount, the length l2 being represented by the equation l2=(N2/N1)l1, wherein l1 is the length of the recording track corresponding to unit field amount of the recorded signal on the magnetic tape.