The present study examined, from the point of view of hospital classroom teachers, how the teachers provide psychological support to children undergoing medical treatment. Semi-structured interviews were conducted with nine hospital classroom teachers, and analyzed using a modified grounded theory approach. The interviews revealed three common characteristics of experience among hospital classroom teachers: (A) Awareness of the environment surrounding the children and their medical treatment, (B) A sense of feeling troubled, (C) A range of support needs. In addition, hospital classroom teachers reported four support needs related to their work providing psychological support to children undergoing medical treatment; (a) I want to do it myself, (b) I want to do it together with the person concerned, (c) I want you to support school counselor, (d) I want you to improve the system.