**作者：**Longcheen Huwang and Jian Yang**中文摘要：**A measurement error model is considered with emphasis on the case where replicated measurements on the covariate are obtainable. Trimmed estimators of the coefficients in the model are defined based on the regression quantiles and the symmetric quantiles. The asymptotic distributions of these estimators are also obtained. On the basis of the criterion of asymptotic relative efficiency, these trimmed estimators are compared with the usual one and are found to be more efficient when random error in the regression equation has the contaminated normal distribution. A lower bound for the efficiency of the trimmed estimators derived by means of the regression quantiles is provided as well.**英文摘要：**--**中文關鍵字：**measurement error model, trimmed estimators, asymptotic relative efficiency**英文關鍵字：**--