In the literature, it is pointed that distributive justice explains pay satisfaction and job satisfaction better than procedural justice, and procedural justice explains organizational commitment and researcher's evaluation about the supervisor better than distributive justice. We empirically tested if these findings are valid in R&D institutes with the data collected from Korean R&D professionals. It is found that the relations between the justices and the outcome variables are more complicated. The result of the analysis shows that distributive justice is also significantly related to organizational commitment, but not to job satisfaction, and procedural justice is also significantly related to pay satisfaction, and job satisfaction. Implications of the findings and possible influence of the R&D setting are discussed.