Abstract: This study examined the relationship between mindfulness and countertransference and provided initial data related to these concepts. A national random sample of two hundred and three psychologists and trainees each completed a battery of instruments, including demographic measures and the mindfulness (FFMQ) and countertransference (CTQ) questionnaires. They also reported on a randomly selected client in their care. Correlational analyses suggested that mindfulness and countertransference were inversely related and regressional analyses indicated that at least three of the five mindfulness facets predicted degree of countertransference. Perceived adequacy of graduation training regarding countertransference did not affect participants' countertransference scores, and meditation experience did not affect participants' mindfulness scores. Length of participating therapists' personal therapy was related to level of mindfulness but not to degree of countertransference. Findings suggested that mindfulness practice might help psychotherapists avoid engaging in harmful CT behavior toward their clients as it appears to serve as a protective factor.