The growing number of cases of autism has caused an increased interest in so-called 'autistic characteristic of behaviour'. The aim of this study was to explore the relationship between autistic characteristic of behaviour and temperamental traits included in Regulative Theory of Temperament (Strelau, 1985). Two questionnaires have been used: Autism Spectrum Quotient (Baron-Cohen et al., 2001) and FCZ-KT (Strelau and Zawadzki, 1993). The results have shown many correlations between autistic characteristic of behaviour and temperamental traits. Persevaration and emotional reactivity showed positive correlations with autistic characteristic of behaviour, whereas activity, endurance and briskness correlated negatively with this characteristic.