This study deals with the feeding characteristics and intake of eggs Plecoglossus altivelis in spawning areas. The stomach contents from spawning fish which were caught in the spawning bed at Chunji Stream (which is located in Seogwipo, Jeju Island ) during the spawning season on the 4th of December, 1972, were used for investigation. The results obtained are as follows; 1. The stomach contents of Plecoglossus altivelis during the spawning season were about 50% less than during the summer. There was a great difference between the feeding condition of the male population and that of the female population. Therefore, it was confirmed that the male population never shows normal feeding activity. 2. The Plecoglossus altivelis ate 10 families, 22 different species of algae growing on stones. These composed their stomach contents. Among them, the diatoms were the most dominant species eaten. In the case of sand, 73% of the male fish took in sand, while only 33% of the female fish took any in. 3. The stomach contents and the index of fullness of the male population were no more than 32% and 41% respectively in comparison with the female population. However, 67% of the male took in eggs. That is 3 times more than in the case of the female, i.e., 20%. 4. The number of eggs intaken to the volume of the stomach contents was male, 12.88% and female 5.32%. We can see through this value that the male fish intake eggs noticeably more than the female do. 5. The sex ratio was almost equal to that of the fish that intook eggs. The rate was female 1 to male 3. 6. If it were not for the additional eggs from the spawning process, then all the eggs in the spawning bed would be completely intaken and consumed by the fish in 29 days.