Tool for cutting food into pieces

Provided is a tool for cutting food into pieces, that includes at least one cutting element adjacent to a bearing surface. The cutting element has at least one vertical member forming a longitudinal cutting member provided for slicing the food to be cut longways, and a transverse wall having, on either side of the vertical member, two transverse cutting members provided for separating the food pieces that were sliced longways, so as to provide two channels for cut food. The vertical member has a front notch. A retaining member, which is rigidly connected to the bearing surface, can be inserted into the front notch. Also provided is an accessory for preparing food and to an appliance for preparing food having the above-described tool for cutting food into pieces.