The Monthly Film Bulletin wrote: "The opening scenes (Hawkins describing his past triumphs as an assassin and the attempted murder of Marigold) strike a lightly macabre note and suggest another essay in "black" comedy. Unfortunately, the story soon reverts to fairly conventional farce, with jokes about the
B.B.C., the
National Health Service and illicit week-ends in the country. Alastair Sim extracts the maximum amount of ghoulish humour from a sketchily written part, TerryThomas is intermittently amusing in his now familiar act and the direction is brisk. But, in attempting to combine the popular with the more sophisticated, the producers have failed to make the best of either world."
The New York Times noted "Weekend at a horrible little country hotel, same name, and one of the funniest British films ever." The
Radio Times wrote "If you ever doubted that Alastair Sim was the finest British screen comedian of the
sound era, then here's the proof of his immense talent. As the assassin with the mournful smile, he gives a performance of rare genius that more than makes amends for the longueurs in Frank Launder and Sidney Gilliat's script."
Allmovie opined "If
The Green Man finally falls a little short of being classic, it's only because the mechanics of the plot get a bit wearying at times; otherwise, it's a charmingly subversive little treat."
Time Out called it "A splendid black comedy." In
British Sound Films: The Studio Years 1928–1959 David Quinlan rated the film as "good", writing: "Laughter builds up steadily; Sim irresistable."
Leslie Halliwell said: "Cheerful but not very subtle black comedy suffering from the attempt to make a star part out of a very minor character." ==Home media==