Task-based learning is a teaching method that focuses on meaningful learning through completely student-centered homework assignment. The present study investigated the effects of task-based teaching through drawing the concept map as homework on the academic achievement and easier and more effective learning of metabolic pathways of biochemistry course in pharmaceutical students. Having examined the homework assignments done by the experimental group and having given the exam, the scores of both groups were analyzed by independent t-test using SPSS 16 software. The female students in control and experimental groups consisted of 46.67% and 51.11%, respectively. The mean score of experimental group (11.76±2.45) was significantly higher (p<0.001) than that of the control group (8.78±2.79). Task-based teaching via drawing the concept map of metabolic pathways in biochemistry course as homework promotes the academic achievement of pharmaceutical student.