To investigate the relationship between lead levels and behavioral problems in children, hair lead levels were compared in a group of children (N=26, mean age 10.73) judged by teachers to have behavioral problems with a control group (N=29, mean age 8.68) judged not to have behavioral problems. There were no significant differences between groups in socioeconomic status, sex, or ethnic group distributions. Each child was rated by his/her teacher on the Walker Problem Behavior Identification Checklist (WPBIC). Behavior problem Ss had significantly higher hair lead levels, and lead correlated significantly and positively with the WPBIC scales measuring distractibility, aggression, disturbed peer relations, and immaturity. (Author/CL)