A cheese slicer having a bottom plate on which a block of cheese can be placed, a vertical guide rod mounted on the bottom plate having an external thread on which a slicing arm with a slicing string, and a roundel with an internal thread, which is received on the external thread. The slicer also has a holding arm, which holds the upper part of the block of cheese in position during the slicing operation. The holding arm includes a second roundel, which is coupled to the slicing arm roundel, and which has an internal flush bore such that the holding arm is slidably mounted on the guide rod below the slicing arm roundel and moves vertically. The holding arm prevents tilting of the cheese and the cutting of slices not of uniform thickness.