A juice extractor for extracting juice from comestibles, such as fruit or vegetables, includes a cavity in which the comestible is received and a cutter which is moveable between a first position in which the cutter lies outside the cavity and a second position in which the cutter projects into the cavity. A drive system is provided for driving the cutter into the second position while the comestible is supported in the cavity. The distance by which the cutter projects into the cavity in the second position may be dependent upon the size of the comestible located in the cavity.