An easy-to-use food slicer can slice food into predetermined thickness. This easy-to-use food slicer includes a motor 30 and a structure 10 in which the belt blade 14, four sets of pulleys 11, 11′, 23, 23′ and a driving
transmission system 12, 12′, 13, 13′, 15, 16, 16′, 17, 17′, 18, 19, 19′, 20, 20′ are installed, four sets of pulleys 11, 11′, 23, 23′ and a driving
transmission system 12, 12′, 13, 13′, 15, 16, 16′, 17, 17′, 18, 19, 19′, 20, 20′. The driving
transmission system transforms rotation movement of motor 30 into back and forth movement of belt blade 14, which cuts food under the easy-to-use food slicer.