We have measured the electrical resistivity, specific heat, magnetic susceptibility, magnetization, magnetoresistance and de Haas-van Alphen effect to clarify the magnetic and elecrtical properties of NdCu2. The magnetic phase diagram is presented for the field along the b-axis, which consists of five or more magnetic phases. The Fermi surface of NdCu2 is not similar to that of YCu2 nor to that of CeCu2. Cyclotron masses of NdCu2 range from 0.4 to 1.5 m(0), which are larger than 0.1-0.7 m(0) in YCu2, but smaller than 0.5-5.3 m(0) in CeCu2.