The paper, starting with concept of defiance and affray crime, discusses the constitutive elements of defiance and affray crime at the light of object infringed by the crime and subjective factors.

• 应理清寻衅滋事罪概念和构成要件，准确把握该罪主观方面独特性的本质特征，这对正确认定此罪有重要的理论意义和实践价值。