A sharpener for an ice screw with a tubular shank and a bit, comprising: a fixed sharpening support equipped with a file in the form of an elongate blade, a positioning slide of the ice screw at predefined angles with respect to the file, said slide being able to move in translation astride the two opposite surfaces of the file, and guiding and stopping means of the bit in the slide comprising at least one opening for inserting the shank and a securing stud salient from the associated opening.