Pandang Island is one of the islands located in the Strait of Malacca. The Island has a variety of marine life, especially Phylum Echinoderms. The purpose of this study was to determine the diversity and environmental conditions of shallow waters of Pandang Island, Tanjung Tiram Districts, Regency Batu Bara, Sumatera North. This study was conducted on May 2016 using direct observation method. Data collection was performed with a quadratic transect method, and data analysis using the formula index diversity. Based on the observation it was found four species of Echinoderms, namely: Diadema setosum, Holothuria atra, Holothuria leucopsilota, and Ophiocoma erinaceus, with diversity index was ranged from 0,54 to 1,06, and environmental conditions with temperature 29,7°C – 33,9°C; DO 7,4 mg/L – 8,3 mg/L; salinitas 30 – 31 ; dan pH 8,3 – 8,5. Conclusion obtaind is diversity index of Echinoderms in the water of Pandang Island belonged to low-moderate, the waters of Pandang Island was still in a good condition for Echinoderms.