Psychological research has shown the detrimental effects that overt heterosexism have on lesbian, gay, bisexual, and queer (LGBQ) clients and on the psychotherapeutic relationship. However, the effects of subtle forms of discrimination, specifically sexual orientation microaggressions, have on LGBQ clients and the therapeutic relationship have not been addressed. This study used qualitative methodology to explore the phenomenon of sexual orientation microaggressions with 16 self-identified LGBQ psychotherapy clients. Results of this study support the existence of sexual orientation microaggressions within the therapeutic environment and provide a descriptive account of 7 sexual orientation microaggression themes, channels of microaggression communication, and the impact microaggressions have on therapy and clients. (Contains 2 tables.)