Objectives: The objective of this study was to provide an actual data for parents of infants about growth developmental status of brestfed infants. Methods: The subjects were 150 brestfed infants of 5, 6, 7 months as a primary nutrient source. Results: 1) The mean score of growth developmental status of subjects were $8.6({pm}1.15)$ and $9.5(({pm}.58)$ at the highest points of 10.0. 2) The growth status was signifant difference according to feeding type(t=-2.076, p=.040), development status was signifant difference according to infant age(F=8.272, p=.000). Conclusions: The main point infants breast milk is very beneficial to infants growth development status. This result can be used as an important guide for nurses to teach the infants parents.