Background: The effectiveness and efficacy of teaching behaviors by clinical educators need to be determined and applied in caring environments, wherein students' seminal Professional Behaviors (PBs) are being shaped. Here, we endeavor to compare the relationship between Iranian clinical educators' teaching behaviors and undergraduate nursing students' PBs. Materials and Methods: This descriptive correlational study was conducted on 189 students enrolled in the second, third, and fourth academic years at Urmia University of Medical Science in 2019. The instruments were the Nursing Students' PBs Scale (NSPBS) and the Nursing Clinical Teacher Effectiveness Inventory (NCTEI). Data were analyzed by Pearson correlations test and linear regression model. Results: A significant positive correlation between the NSPB and NCTE in the fourth year (r = 0.42, p = 0.001) was about twice as much as the second (r = 0.28, p = 0.017) and third ones (r = 0.28, p = 0.033). Nursing competency, teaching skills, and communication domains were respectively the most effective ones related to the second- (r = 0.35, p = 0.003), third- (r = 0.32, p = 0.015), and fourth-year NSPBs (r = 0.46, p < 0.001). Teaching skills and nursing competency domains had the lowest significant relationships with the second- (r = 0.25, p = 0.034) third- (r = 0.30, p = 0.023) and fourth-year NSPBs (r = 0.35, p = 0,006), respectively. Conclusions: The comparison between the two mentioned variables in the academic year can provide appropriate information about potential problems of clinical education to develop clinical facilitation models.