Precursor T-cell lymphoblastic lymphoma (T-LBL) is a clinically aggressive disease, associated with a high subsequent relapse rate. We treated a pediatric patient with T-LBL who relapsed after an autologous peripheral blood stem cell transplantation. Unmanipulated peripheral blood was used as a source for the graft. Hematopoietic engraftment was prompt and the risk of graft-versus-host disease was acceptable. The patient has been in continuous complete remission without chronic graft-versus-host disease for 32 months. Hence, haploidentical peripheral blood stem cell transplantation might be one of the adoptive options for salvage therapy in patients with recurrent or refractory T-LBL, and unmanipulated peripheral blood might be acceptable as a graft.