The Karolinska Psychodynamic Profile, KAPP, is a rating instrument founded upon psychoanalytic theory. Its validity is satisfactory, and high interrater reliability can be attained with modest training of the raters in using the instrument. It enables relatively stable and only slowly variable modes of mental functioning and character traits to be assessed psychodynamically. The profile is based upon eighteen subscales, by means of which these modes of mental functioning and character traits can be represented. The subscales have been chosen with a view to obtaining a comprehensive assessment of modes of mental functioning and character traits, as reflected in the patient's self-image and relationships with others. The subscales and their scale steps have been provided with relatively detailed descriptions which are kept close to clinically observable phenomena. The information needed for making the assessments is obtained through a structural interview procedure. The manual, the subscales and their scale steps, and the assessment procedure is presented.