Submission wrestling (also known as submission fighting, submission grappling and No-Gi Jiu Jitsu) or Combat wrestling in Japan, is a formula of competition and a general term describing the aspect of martial arts and combat sports that focus on clinch and ground fighting with the aim of obtaining a submission using submission holds.

The sport of submission wrestling brings together techniques from Brazilian Jiu-Jitsu, Folk American Wrestling (Catch-as-catch-can), Luta Livre Esportiva, Freestyle Wrestling, Judo and Sambo. Submission fighting as an element of a larger sport setting is very common in mixed martial arts, Pankration, catch wrestling and others. Submission wrestlers or grapplers usually wear shorts, skin-sticky clothing such as Rash guards, speedos and mixed short clothes so they do not rip off in combat.

Mixed martial arts schools and fighters may use the term "submission wrestling" generically to refer to their grappling methods while avoiding association with any one art. Submission wrestling is also sometimes used to describe the tactic (in mixed martial arts competition) that revolves around using submission wrestling skills to defeat an opponent.