Abstract: The present invention relates to a plant protein fraction from legumes or oil seeds for use in foodstuffs or in feedstuffs and to a process for producing the plant protein fraction. In the process a first protein fraction is separated from comminuted leguminous seeds or oil seeds using a solvent to leave behind a second protein fraction, and a water-containing protein fraction obtained by this fractionating step directly or after addition of water is subjected to treatment with enzymes one or more times, a heating to a temperature>70° C. one or more times, optionally a fermentation one or more times and a pressure and/or shear treatment one or more times. The plant protein fraction produced with the process exhibits a reduced immunoreactivity and has good techno-functional and organoleptic properties.