The level structure of101Ru has been investigated from the decays of101mRh and101gRh. For the gamma-ray measurements Ge(Li) detectors with effective volumes of 24 and 43 cm3 were used for singles and coincidence work, and several new transitions were observed. Conversion electron spectra from the101mRh decay were investigated with a 50 cm double-focussing beta spectrometer.K-conversion coefficients were determined by combining internal conversion and gamma-ray intensities. For the stronger transitions probable multipolarity assignments have been obtained from these coefficients and also fromK/L andL-subshell ratios. All transitions observed were fitted into a decay scheme, in which tentative spin-parity assignments of all states are given.