This study is performed to reveal the safety and feasibility of combination therapy with autologous cord blood mononuclear cells (CB) and G-CSF as well as repeated administration of G-CSF for children with cerebral palsy. The evaluation tools are as follows: (1) Developmental tests (DDST, PEDI, GMFM, GMFCS, MACS, QUEST), (2) Neurocognitive function test (WPPSI-IV), (3) Brain MRI-DTI, (4) Peripheral blood CD34+ cell counts, (5) Neurotrophic factors/anti-inflammatory cytokines.