The decay of the 46.6 s isomer of75Ge is investigated by gamma-spectroscopic measurements using an enriched76Ge target and highresolution X-ray Ge(Li) and 32.2 cm3 Ge(Li) detectors. New γ-rays have been found at energies 61.92, 77.86, 121.15, 136.01, 279.48 and 400.20 keV, in addition to a strong γ-ray at 139.68 keV, which was previously known to occur in the decay of75Gem. TheK conversion coefficient of the 139.68 keV transition has been measured and found to be 1.40 ± 0.07, supporting anE3 multipolarity assignment for this transition in75Ge. A decay scheme for the 46.6 s75Gem is proposed which shows for the first time a β-decay to75As, populating a level at 400.60 keV, and a cascade of γ-rays of energies 77.86 and 61.92 keV in75Ge in addition to a cross-over transition of 139.68 keV, populating the ground state of75Ge. The half-life of the 139.68 keV level in75Ge has been determined. The intensity and logft of the new β-group, and the spins and parities of the levels in75Ge are given and the results are discussed.