Numerous authors have suggested that the working relationship between coach and coachee constitutes an essential condition to the success of executive coaching. This study empirically investigated the links between the coach-coachee relationship and the success of a coaching intervention in an organizational setting. Data were collected from two samples: 73 managers who received executive coaching for a period of eight months and 24 coaches. Results from 31 coach-coachee dyads were analyzed. Results indicate that the coach-coachee relationship plays a mediating role between the coaching received and development of the coachees' self-efficacy. Findings also show four significant correlates to the coach-coachee relationship: the coach's selfefficacy with regard to facilitating learning and results, the coachee's motivation to transfer, his or her perception of supervisor support, and the number of coaching sessions received.In organizational settings, executive coaching has become an increasingly common skill-development method (Bacon & Spear, 2003;Kampa-Kokesch & Anderson, 2001). The International Coaching Federation (ICF) alone numbered 15,000 members in 90 countries in 2008. However, many authors have noted the lack of scientific studies on the process and the outcome of executive coaching (see Lowman, 2005;Sue-Chan & Latham, 2004), and others have argued that this development approach is overused considering the paucity of research on the subject (McGovern et al., 2001). In short, the results from empirical studies indicate that executive coaching is positively associated with self-efficacy (Baron & Morin, 2007;Evers, Brouwers, & Tomic, 2006), leadership (Thach, 2002) (Smither, London, Flautt, Vargas, & Kucine, 2003). In regard to the process, very little is known about the variables that influence its effectiveness.The working relationship established between the coach and the coachee appears to be a key process variable. Numerous authors have suggested that a good working relationship constitutes an essential condition for the success of executive coaching (Kampa & White, 2002;Kampa-Kokesch & Anderson, 2001;Kilburg, 2001;Lowman, 2005). However, there are scarcely any reported studies of the link between the coach-coachee relationship and the effectiveness of executive coaching. Further, to our knowledge there are no studies that have examined the determinants of the coach-coachee working relationship. The goal of our study was to partially fill that gap in the literature. Our first objective aimed to answer the question, What role does the working relationship between the coach and the coachee have in executive coaching outcomes? In this study, exploration of the coach-coachee working relationship has been largely inspired by the literature on the working alliance from the psychotherapy domain. Specifically, we attempted to empirically explore the links between the coach-coachee relationship and self-efficacy, a variable significantly associated with training outcomes (Colquitt, LePine, & Noe, 2000;Salas & C...