Lazy Dungeon Master (絶対に働きたくないダンジョンマスターが惰眠をむさぼるまで, Zettai ni Hatarakitakunai Danjon Masutā ga Damin o Musaboru Made) is a Japanese light novel series written by Supana Onikage and illustrated by Youta.

It began serialization online in April 2015 on the user-generated novel publishing website Shōsetsuka ni Narō.

A manga adaptation with art by Nanaroku has been serialized online via Overlap's Comic Gardo website since 2018.

The light novel was originally published by Supana Onikage as a free-to-read web novel on Shōsetsuka ni Narō in April 2015 and Overlap published the first volume in print with illustrations by Youta in April 2016.

The light novel is licensed in North America by J-Novel Club.