Pekka and Pätkä as Frogmen (Finnish: Pekka ja Pätkä sammakkomiehinä) is a 1957 Finnish film directed and written by Armand Lohikoski. It is the ninth film in the 13-part Pekka Puupää series produced by Suomen Filmiteollisuus. The story continues in the following film Pekka ja Pätkä Suezilla. In one of the scenes, Pekka and Pätkä perform as magicians, using the magic word "ananasakäämä", which later became famous through Timo Taikuri.

Lohikoski directed all but the first and last of the Puupää films produced by Suomen Filmiteollisuus. He also wrote the scripts for many of them and appeared in small roles in four.

Frogmen is considered by many critics to be the best in the series. In the film, Pekka and Pätkä, as traveling musicians, are called up for military refresher training and end up representing the Finnish Navy in a boxing match against the Finnish Army. A critic praised the film for its smooth progression and noted its multi-level humor, folk anecdotes, and emerging rock culture. Another critic admitted that although the film "lacks any hint of intellect," it has a unique charm. Wilén's mermaid character was noted for her boldness.