Abstract: A safety lock for a seat belt buckle includes a housing for receiving and containing the seat belt buckle therein and a locking portion for releasably retaining the housing in a closed position wherein the buckle is substantially enclosed therein. When the safety lock is assembled in the closed position on a seat belt buckle and the buckle is utilized for detachably interconnecting first and second seat belt sections, the safety lock restricts access to the buckle in a manner which normally prevents a small child from disconnecting the seat belt sections but nevertheless permits the seat belt sections to be easily disconnected by an adult.