This study assessed bonding of orthodontic metal brackets to porcelain surfaces using various surface treatment methods to define the procedure that produces adequate bond strength between brackets and porcelain. Seventy porcelain tabs were divided into 7 groups and after surface deglazing with diamond bur, were subjected to different methods including: adhesive application, silane application, %9.6 hydrofluoric acid etch (HF) and adhesive, %9.6 HF and silane, %1.23 APF gel and adhesive, %1.23 APF gel and silane. The metal brackets were bonded with no-mix orthodontic bonding material. The shear bond strength of specimens was tested with a universal testing machine, 24 hours after bonding. Bond failure sites were scored according to modified Adhesive Remnant Index (ARI) system. Differences between groups were analyzed statistically. Highest bond strengths (11.6 and 9.7) were obtained when the porcelain surface was etched with %9.6 HF. Brackets bonded after etching with APF had significantly lower bond strength values (6.3 and 3.8). ARI scores were higher in cases with increased bond strengths. In conclusion, etching the porcelain with %9.6HF followed by adhesive or silane application provided high and acceptable shear bond strengths. Application of adhesive alone provided lower bond strengths which were clinically acceptable.