This research aims to fabricate new advanced materials by a method of solution mixing of acrylonitrile butadiene styrene (ABS) and multi-wall carbon nano tubes (MWCNT) using fused deposition modelling type of additive manufacturing for higher technologies, such as in aviation industry and automotive. The mechanical strength, thermal stability, and electrical conductivity of a 3D printed ABS-MWCNT composite were assessed at optimum fused filament fabrication (FFF) printing parameter. Printing more than 10% weight concentration of MWCNT-ABS polymer by FFF is difficult, since clogging was happen repeatedly. In this paper 1%, 3%, 5%, 7%, and 9 % weight concentration of MWCNT were mix to ABS polymer by solution mixing process and the best mechanical property improvement was recorded at 7% weight concentration of MWCNT. Young's modules, yield stress and braking stress are increase from pure ABS by 103.6%, 28.8%, 53.6% respectively. Contrary to these results, strain values fell as MWCNT concentration rose. Breaking strain drops in 50% at 9% MWCNT weight concentration. The electrical resistivity of ABS polymer for 3D printing is decrease significantly after a 3% weight concentration combination of MWCNT. Pure ABS has a resistivity of 2.5×10 5 Ωcm and it drops to 6.02×10 4 Ωcm when it is reinforced with 3%MWCNT weight concentration. At 9% MWCNT concentration, the resistivity decreased to 9.63×10 3 Ωcm. this indicates electrical resistivity of ABS-MWCNT composite filament is decrease as the weight concentration of MWCNT increases in ABS polymer. Unlike that of mechanical and electrical property improvement, MWCNT has not a great significant effect on the thermal stability of ABS polymer for 3D printing. There is no significant and clear difference in glass transition and melting temperature between pure ABS and reinforced one. Even though the initial thermal stability of pure ABS is better, after onset temperature the degradation rate is faster for composite one, and the mass left after maximum degradation temperature is greater for more concentration of MWCNT in ABS polymer. Keywords: acrylonitrile butadiene styrene, multi wall carbon nano tube, fused deposition modelling, additive manufacturing,