To hold foodstuffs by a protective member regardless of the size of the foodstuffs, and to obliquely slice the foodstuffs as well as slicing the foodstuffs into rings.

The slicer includes a body part having a slice surface, and a finger protective member slidable along the slice surface. The finger protective member includes a holding part for obliquely supporting the foodstuffs with respect to the slice surface by holding the foodstuffs.