The fission fragment angular distributions are measured with Lexan polycarbonate plastics for alpha-particle induced fission of gold, lead and bismuth. The measurements are made at several alpha particle energies between 40 and 70 MeV. At these energies, the relative differential fission cross sections for gold, lead and bismuth acting as targets are measured at several angles between 0° and 180° and the resulted angular distributions are fitted by least square method with Legendre polynomials. The anisotropies W(0°) / W(90°) at several alpha particle energies are measured for the above targets. These data are utilized in the calculation of the energy dependence of K_0~2, the standard deviation of the distribution of the angular momentum projection on the nuclear symmetry axis at the saddle point. The integral cross section for alpha induced fission in each target is determined by numerical integration of the respective differential cross sections measured in the center of mass system. The results ar The fission fragment angular distributions are measured with Lexan polycarbonate plastics for alpha-particle induced fission of gold, lead and bismuth. The measurements are made at several alpha particle energies between 40 and 70 MeV. At these energies, the relative differential fission cross sections for gold, lead and bismuth acting as targets are measured at several angles between 0 ° and 180 ° and the resulting angular distributions are fitted by least square method with Legendre polynomials. The anisotropies W (0 °) / W (90 °) at several alpha These data are utilized in the calculation of the energy dependence of K_0 ~ 2, the standard deviation of the distribution of the angular momentum projection on the nuclear symmetry axis at the saddle point. The integral cross section for alpha induced fission in each target is determined by numerical integration of the proper differential cross sections measured in the center of mass sys tem. The results ar