Organic thermoelectric materials are attracting attention because of their mechanical flexibility. In this paper, authors fabricated the organic thermoelectric materials with elastic features. Three-dimensional tubular graphene(3D graphene) was combined with polyaniline(PANI) at various concentration. Maximum thermoelectric figure of merit, which evaluates thermoelectric materials was 0.02 at room temperature in 55 wt% 3D graphene/PANI composite bulks. Furthermore, this bulk exhibited good elastic feature with Young modulus of 1.02 MPa. This material also exhibited stable mechanical properties and performance even after 100 times compression cycles. This work demonstrates a new strategy for preparing high performance elastic thermoelectric materials.