An electrical connector with an electrically insulating elastic body is disclosed, comprising an electrically insulating elastic body and a multiple of electrical pieces inclinedly disposed in the electrically insulating elastic body. When the electrical connector is compressively contacted with external electronic devices, the electrical pieces will undergo rotating displacement; when the external electronic devices retreat from the compressive contact, the electrically insulating elastic body will push the electrical pieces back to their original positions. Compared with conventional prior art, the electrical piece of the electrical connector according to present invention can undergo rotating displacement to enable the electrical pieces to have larger elastic deformation, such that good contact can be ensured when the flatness of the connected electronic devices is poor and larger normal force on the electrical pieces can be obtained.