This paper discusses three cognitive models for the obsessive compulsi
ve disorder (OCD). Further, a cognitive formulation of OCD which stres
ses the importance of the perception of danger and responsibility is d
escribed. Several specific cognitive interventions, which address the
estimation of catastrophes and the perception of personal responsibili
ty, are presented and illustrated with patient material. Furthermore,
problems with cognitive therapy with OCD patients are described and so
me solutions for these pitfalls are discussed. Finally, the findings o
f controlled studies into cognitive therapy with OCD are given.