Relation of peak cutting force with varying contact area and cutting speed is needed to design an efficient and versatile slicer or cutter to cut the potato in desired shape without any textural deformation with lest energy consumption. Peak force for transverse cutting of peeled potato, consisted homogeneous textural characteristics of flesh, has been determined at cutting speeds of 20, 30, 40 mm/min using single-cut knife-edge angle of 15 degree fixing in Universal testing machine. The relation of different knife speed (20, 30, 40 mm/min) and contact area of 200, 300, 400 and 500 mm2 on peak cutting force were observed for constant angle of cutting edge of knife. Peak cutting force with lowest speed (20 mm/min) were noticed minimum (8.74±0.94N) for lowest contact area (200 mm2) and maximum (18.84±0.76N) for 500 mm2 contact area respectively, indicates less cutting force required during cutting operation for lower knife speed and simultaneously cutting force for constant contact area was noticed maximum and minimum for knife speed of 40 and 20 mm/min respectively. Effects of cutting speed and contact area of sample were found significant (p<0.05). Quadratic regressions equation (regression model) was good fit for explaining the relation of two variables (knife speed and contact area) on the response (peak cutting force).