Preterm babies are the delicate lives to be taken care of very intelligently as well as delicately. Preterm babies are physically immature and physiologically unstable. They cannot tolerate environmental stimuli. Due to immaturity, they often lack adequate muscle tone and are at the risk of developing an abnormal posture. Nesting helps maintain position, promote comfort and provide physiological, behavioral and postural stability to premature babies. The purpose of the study is to see effectiveness of nesting on posture and movement of in healthy preterm infant. Methods: Quasi experimental pre and post -test control group design was used to measure the effectiveness of nesting on posture and movement. Non - probability Purposive sampling technique was used to select the sample comprised of 60 preterm babies at NICU in selected hospital, Coimbatore. The study used that the Infant Position Assessment Tool and Modified Ferrari Observational Checklist to assess the effectiveness of Nesting on Posture and Movement.Results: Post-test mean score of nesting on posture was found to be 11.07 andSD1.285 in experimental group. Where as in control group it was found to be 7.20 andSD1. 669. Thestatisticalpaired, ‘t’testvalueis13.357. Post-test mean score of nesting on movement was found to be 11.07 and SD1.285 in experimental group. Where as in control group nesting was found to be 7.20 and SD1. 669. The statistical paired t‟test value is 20. 451. The study found that There is a significant correlation (r= 0.296) was found between position and movement. Conclusion: Nesting is convenient, cost effective, requires less time and skills, hence it is easy for the nurse to practice and in turn be beneficial for preterm babies, starts with simple intervention by making nest for the preterm.