A chelate-metal complex such as zinc bis(2-(2-hydroxyphenyl) benzothiazolate) (Zn(BTZ)(2)) was known to show white emission with a broad electroluminescence([1-2]). In this study, the electroluminescent characteristics of Be(BTZ)(2) and Mg(BTZ)(2), as well as Zn(BTZ)(2) were investigated using organic electroluminescent devices with the structure of ITO/TPD/Be(BTZ)(2), Mg(BTZ)(2), or Zn(BTZ)(2)/Al. It was found that the device containing Be(BTZ)(2) shows the highest power efficiency.