This study investigated psychometrics (internal consistency, factor structure) of the Parental Knowledge and Monitoring Scale (PKMS) when used for parents of children aged 10-13 years. We also evaluated PKMS associations to child conduct problems and potential moderators (family warmth, and conflict). Totally 1442 parents participated. The internal consistencies ranged from alpha .70 to .90. A confirmatory factor analysis of the sources of parental knowledge resulted in a fairly acceptable fit for a 4-factor model (Parental Solicitation, Parental Control, Child Disclosure, and Secrecy: RMSEA=.076, CFI=.99, GFI=.94). The subscales correlated positively (Secrecy negatively) with Parental Knowledge. Secrecy was associated with conduct problems in a hierarchical regression analysis. Family warmth and conflict significantly moderated the association of parental knowledge to conduct problems.