Par le trou de la serrure is a 1901 French silent short comedy film directed by Ferdinand Zecca and distributed in France by Pathé Frères.

Zecca was clearly influenced by George Albert Smith who had used for the first time these innovations in 1900 in his short films Grandma's Reading Glass and As Seen Through a Telescope.

[2] Par le trou de la serrure is also characteristic of a certain voyeuristic trend in early cinema in showing what was normally hidden in a hotel room.

The film was judged by some, notably Georges Méliès's granddaughter, as being of dubious taste.

[3] Par le trou de la serrure was distributed by Pathé Frères in 1901 in France, and in 1902 in the United States.