"Taking his cues from the French New Wave but adding an intimate, non-judgmental empathy all his own, Loach immerses us in the character of Joy - her loves, fears and failings," wrote Time Out reviewer Tom Huddleston.
"But Poor Cow also offers a microcosm of working-class life, with Chris Menges' restless camera winding through bustling streets and bombsites, smoky pubs and poky flats.
"Poor Cow is a remarkable film, a time-capsule character study of great warmth and compassion."
Loach's better known second film, Kes, from 1969, will also screen in this year's film society programme on November 13.
Poor Cow screens at the Davis Theatre, Whanganui Regional Museum at 7pm on Monday, May 1.