Bussen

Bussen is a 1961 Norwegian comedy film, directed by Arne Skouen and starring Leif Juster, and a strikingly similar 1963 Danish comedy film directed by Finn Henriksen and starring Dirch Passer. The plot and script are essentially the same in both films. The Danish version is made suitable for a Danish audience. The music to the Norwegian version was written by Maj Sønstevold and Gunnar Sønstevold, with additional songs written by Alf Prøysen. The original main character was written for Leif Juster. At this point in his career, Juster was a popular movie actor. It is possible that Arne Skouen was inspired by a narrative poem written by the poet Ingeborg Refling Hagen, about a milkman who is constantly running errands because of his good heart.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.