The present disclosure provides a vector comprising a promoter and a luciferase gene having a nucleic acid sequence as disclosed in SEQ ID NO: 1 a fertilized egg transformed with the present vector and a transgenic non-human animal overexpressing a luciferase gene from the vector and a method for preparing it. The vector and the animal of the present disclosure have a high expression rate for the luciferase gene, which confers high sensitivity for detection and thus useful for imaging analysis in a variety of research areas.
