'''Bitter vetch''' is a common name for several plants and may refer to:
* ''Vicia ervilia'', called '''bitter vetch''' or '''ervil''', an ancient grain legume crop of the Mediterranean region. *''Vicia orobus'', called '''wood-bitter vetch''', a legume found in Atlantic areas of Europe. * ''Lathyrus linifolius'', called '''bitter vetch''' or '''heath pea''', a species of pea. *''Lathyrus niger'', called '''black bitter vetch''' or '''black pea''', a perennial legume native to Europe. {{Plant common name}}