Data were obtained between June 1985 and June 1986 as part of an ethnographic study of a medium-sized metropolitan police department in Colorado. The study examined the nature of interpersonal relationships among police patrol officers, focusing on humor and joking relationships as complex, patterned constructions of interpersonal behavior and as strategic activities serving various functions for the group. An effort was made to interpret and assign meaning to police humor by identifying how it was responsive to specific contextual situations and how it was consistent with normative properties of the more general occupational structure. Four types of humor were investigated: jocular aggression, audience degradation, diffusion of danger/tragedy, and normative neutralization. Study findings revealed that a serious theme expressed in jest rather than in earnest tended to dramatize the message. Humor provided a forum for presenting concerns without directly threatening the system that fostered them. As first-line supervisors, police sergeants occupied rather incongruous positions in the police organization, and interpersonal relationships between police sergeants and police patrol officers were structurally ambiguous. 25 references and 3 footnotes