The effects of an educational support program on school children who participated in the programs held in 2014 were examined in this study. The educational support program was held at a clinic of school psychology at the Center for School Education and Research of Hiroshima University called Niko Niko Room. Twenty-nine school children and their guardians answered questionnaires about the program. Results showed the following: (1) Educational support had a positive effect on children’s “self-efficacy regarding arithmetic”. (2) Both children and guardians positively evaluated the effects of this program, and both of them estimated students’ abilities high. (3) Children’s estimation of students’ communication and understanding had positive relations to their “interests in arithmetic”. Guardians’ estimation of students’ communication also had a positive relation to their estimation of “their children’s interests in arithmetic”.