We have obtained the J K images of the central region of the globular cluster M3 (NGC5272), using the 256×256 InSb array. We present JK photometry of bright red giant branch stars in the central 2'.2×2'.2 region of M3. The infrared color-magnitude diagrams are presented. The comparison of the red giant branch of M3 with that of M13 confirms that both globular clusters have similar metal abundances.

• LEE SANG-GAK(Department of Astronomy, Seoul National University)
• LEE MYUNG GYOON(Department of Astronomy, Seoul National University)
• KIM EUNHYEUK(Department of Astronomy, Seoul National University)