A manual ceramic cutter including a toolholder and a toolholder guide system, the toolholder comprising a handle for the actuation thereof and carrying a cutting tool for scoring a ceramic part, the toolholder guide system comprising parallel guides for the longitudinal movement of the toolholder; wherein: each one of the guides is formed by a profile; and the toolholder comprises, at each side thereof, two end bearings (31, 32) and at least one intermediate bearing which come in contact with the guide corresponding to the same side; characterized in that: the end bearings (31, 32) and the intermediate bearings are mounted on bearing carriages disposed on the sides of the toolholder; each guide comprises upper and lower steel rods (21, 22), disposed longitudinally, forming races for the bearing carriages; in each bearing carriage, the two end bearings (31, 32) are disposed at the same height and come in contact with the upper steel rod of the guide corresponding to the same side, and the at least one intermediate bearing is disposed at a lower height than the two end bearings (31, 32) and comes in contact with the lower steel rod of the corresponding guide; and the profile forming each guide is made of aluminium and has at least one longitudinal cavity in which a steel bar is housed that is configured to reinforce and prevent the bending of the guides. each one of the guides is formed by a profile; and the toolholder comprises, at each side thereof, two end bearings (31, 32) and at least one intermediate bearing which come in contact with the guide corresponding to the same side; characterized in that: the end bearings (31, 32) and the intermediate bearings are mounted on bearing carriages disposed on the sides of the toolholder; each guide comprises upper and lower steel rods (21, 22), disposed longitudinally, forming races for the bearing carriages; in each bearing carriage, the two end bearings (31, 32) are disposed at the same height and come in contact with the upper steel rod of the guide corresponding to the same side, and the at least one intermediate bearing is disposed at a lower height than the two end bearings (31, 32) and comes in contact with the lower steel rod of the corresponding guide; and the profile forming each guide is made of aluminium and has at least one longitudinal cavity in which a steel bar is housed that is configured to reinforce and prevent the bending of the guides. the end bearings (31, 32) and the intermediate bearings are mounted on bearing carriages disposed on the sides of the toolholder; each guide comprises upper and lower steel rods (21, 22), disposed longitudinally, forming races for the bearing carriages; in each bearing carriage, the two end bearings (31, 32) are disposed at the same height and come in contact with the upper steel rod of the guide corresponding to the same side, and the at least one intermediate bearing is disposed at a lower height than the two end bearings (31, 32) and comes in contact with the lower steel rod of the corresponding guide; and the profile forming each guide is made of aluminium and has at least one longitudinal cavity in which a steel bar is housed that is configured to reinforce and prevent the bending of the guides.