Carton with fastening structure

A carton with fastening structure, comprising:

• an inner box, including an inner case body;
• an outer case cover, including an outer cover body sheltering said inner case body, said outer cover body including an opening, provided for said inner case body to slide in, and said outer cover body slipping relative to said inner case body to shelter said inner case body at a closed position;
• and
• an elastic fastening part, including a shifting part and fixed inside said inner case body, while said outer cover body and said inner case body respectively including an outer through-hole and an inner through-hole correspondingly to said elastic fastening part, when said outer cover body is at said closed position, said shifting part comprising a fastening position and a retracted position wherein said shifting part passes through the inner through-hole of said inner case body and the outer through-hole of said outer case body at said fastening position;
• and wherein said shifting part does not pass through said inner through-hole of said inner case body and said outer through-hole of said outer case body at said retracted position.