Five hundred and thirty‐one Swedish boys and 559 Swedish girls completed the Junior Eysenck Personality Questionnaire (J.EPQ) translated into Swedish by the authors (A.‐L.v.K. and L.v.K.). Factor comparisons indicated virtually identical factors of Psychoticism (P) Extraversion (E), Neuroticism (N) and social desirability—Lie (L)—in Sweden as in England. Slight item additions produced scales with adequate reliabilities. Sex differences were in line with most studies, i.e. boys scoring higher than girlson Psychoticism (P) but lower on Neuroticism (N) and Lie (L). Finally, the only significant cross‐cultural difference between Swedish and Engish children proved to be on Neuroticism (N) where the Swedish children had much lower scores than the English