This paper aims to explore into the impact on job performance through the individual traits, interpersonal network and department culture. Objects in this study were staff members from the aditional manufacturing industry that included four departments, and a total of 41 effective samples. Interpersonal network includes three types, advice network, friendship network and information network. This study used ?Social Network Analysis? and Ucinet 6.212 to compute the network degree and network betweenness of all respondents. People who get higher personal network degree will be much more closer to network central. People who get higher network betweenness will be much more capable to play a ?local bridge? role. Besides, the SPSS 12.0 software was used in this study to perform various statistics analysis. The results mainly show that: 1. The network degree and network betweenness of Interpersonal Network have positive effects on job performance: in the subjective, result shows that they have no effects on job performance; however, in the objective, they have positive effects on job performance. 2. Agreeableness, openness, conscientiousness and extraversion have positive effects on job performance: In the subjective, agreeableness and openness have positive effects on job performance; however they have no effects on job performance in respect to the objective. Sensitivity has a negative effect on job performance: however, neither in the subjective nor in the objective it has effect on job performance. 3. Department culture has a positively strengthened effect on network degree and network betweenness of interpersonal network as well as on job performance. However, in respect to the objective, network degree and network betweenness of interpersonal network do not enhance job performance by means of strengthening or weakening the department culture.
