1. Lawyers;
2. People's organizations or people recommended by the unit where the criminal suspect or defendant works;
3. Guardians and friends of criminal suspects and defendants.
Legal basis: "According to Article 34 of the China People's Republic of China and the State Criminal Procedure Law, a criminal suspect has the right to entrust a defender from the day when he is interrogated for the first time by the investigation organ or takes compulsory measures; During the investigation, only lawyers can be entrusted as defenders. The defendant has the right to entrust a defender at any time.