This chapter delves into issues specific to the working relationship between the art therapists and the non-art-therapist supervisor. Fundamental elements of supervision, common ground between the supervisor and art therapists, and how different professional epistemological perspectives enrich the supervisor–supervisee and client–art therapist relationships are discussed. Examples are used throughout the chapter to illustrate supervision issues in relation to developmental stages, particularly for clinicians who are Intermediate and Advanced in their practice. Strategies for navigating the relationship from both the supervisor’s and supervisee’s perspectives are proposed, one being the responsibility of the supervisee to stay abreast with their area of expertise (i.e., art therapy practices), keeping up to date with art therapy literature, and privileging the art therapist’s expertise. This chapter includes clinical supervision vignettes by a guest author and the first author, and practice prompts for supervisors and supervisees to increase interdisciplinary understanding.