The structure, electrical and magnetic properties of Ni47 – xMn42 + xIn11 (0 ≤ x ≤ 2) alloys upon changing the Ni/Mn ratio are investigated and discussed. It is shown that a change in the type of the crystal lattice during the martensitic transformation is accompanied by a substantial change in the electrical resistivity by 45–50%. All the studied alloys exhibit negative magnetoresistance and an inverse magnetocaloric effect. The maximum value of the magnetoresistance in a magnetic field of 18 kOe is found in the Ni46Mn43In11 alloy. The maximum value of the magnetocaloric effect is observed in the Ni47Mn42In11 alloy at T = 325 K.