The Sociomoral Reflection Measure (SRM; Gibbs&Widaman, 1982) was developed as a group administerable instrument for measuring developmental stages of moral reasoning. The aim of this study was to examine its reliability and construct validity, employing a sample of 542 Swedish elementary and high school students (aged 8–17), from schools within metropolitan Stockholm. Interrater reliability varied between 0.83 and 0.92, and the internal consistency coefficient was 0.76. Factor analyses of the norms (on which the overall score is based) revealed one factor for the oldest age group (16–17 years), but two factors among the younger subjects (8–15 years), clearly separating the norms related to each of the two moral dilemmas. The Sociomoral Reflection Maturity Score was moderately, but significantly, related to both age and grade. The results suggests that, although used in a non‐American context and with self‐trained raters, the SRM seems highly applicable in Sweden, at least for research