One form of evaluation apparatus comprising a plurality of light sources vertically arranged by one side of a carrier line in width direction Y perpendicular to carrying direction X of the carrier line; and a light-receiving section arranged by an opposite side of the carrier line in the width direction Y perpendicular to the carrying direction X of the carrier line. Another form of evaluation apparatus comprising a plurality of light sources capable of irradiating measuring lights of given quantity; means for regulating the quantity of measuring lights from the light sources in accordance with sizes of vegetables and fruits; a light-receiving window of given openness provided in a carrier line, the light-receiving window capable of leading measuring lights having been transmitted through the vegetables and fruits toward a light-receiving section; and means for regulating quantities of transmitted light provided to the light-receiving window, the means for regulating quantities of transmitted light being capable of regulating the openness of the light-receiving window.