The purpose of this paper is to analyze the attrition bias problem in the Panel Study of Family Dynamics (PSFD) conducted in Taiwan. In particular, the focus of this paper is on the relationship between sample attrition and labor force participation. Following the framework of Zabel (1998), the author constructed an econometric model to estimate the labor force participation equation and the sample attrition equation jointly. The results show that the labor force participation rates of attriters and nonattriters are similar in size. Furthermore, the attrition bias in the labor force participation equation is not significant.