In the subjective element, the actors of common risk behaviors can be divided into virulence and non-virulence people, and there is a presumption of concurrent negligence, no meaning to contact. 在主观要件方面,共同危险行为的行为人可分为实际致害人和非致害人,实际致害人与非致害人之间具有推定的共同过失,并无意思联络。