This research aimed at constructing and validating helping behavior of bystanders scale (HBBC) in junior high school students. Two important scales were constructed namely, 1) emotional support behavior of bystander scale (ESBBS), and 2) informational support behavior of bystander scale (ISBBS). The statistical approaches were exploratory factor analysis, and confirmatory factor analysis and validation. The samples in this study were grade 7th and 8th students in four junior high schools.  Using multistage quota random sampling, the total samples ...