Objectives The purpose of this study is to investigate about chief complaints of Korean pediatrics and adolescent outpatients in the ${\bigcirc}{\bigcirc}$ university hospital for their recent trend. Methods The study was composed of 4,677 new patients aged between 1 month and 20 years who had been visited pediatrics in ${\bigcirc}{\bigcirc}$ university hospital from 2012 January to 2015 December. Results 1. Among those patients, majority was early childhood as 51.4%, followed by early childhood, late childhood, infancy, and adolescence. 2. Chief complaints in this population have been recorded in the fall the most as 29.6%, but the distribution was inconsistent. 3. To categorize, digestive-related chief complaints were the highest as 30.6%, followed by respiratory, supplemental use, growth, psychiatrics. Respiratory-related chief complaints increased dramatically in the fall. 4. In infancy and early childhood, digestive/respiratory complaints were common, whereas, growth complaints were common in late childhood and adolescence. 5. Digestive/respiratory complaints have been over 50% out of all chief complaints annually. Psychiatric and growth-related complaints have been trending up, whereas, supplemental/skin complaints have decreased every year. 6. Specifically, anorexia were the most common in digestive complaints, and rhinitis/sinusitis were top among respiratory complaints. Precocious puberty and developmental disability increased every year. Conclusions The most common chief complaints were digestive and respiratory-related, and precocious puberty and growth issues have been trending up lately. Based on this result, more studies that targets precocious puberty and growth problems are needed.