The Auger spectra of the M 2, M 3, M 4, M 5 subshells of krypton and the Coster-Kronig spectra of the M 1, M 2, M 3 subshells of krypton were measured with an electrostatical spectrometer. The ionization in the M shells was caused by electron impact. The use of a gaseous target made it possible to measure the Auger lines even at energies as low as 25 eV. The absolute energies and relative intensities of a great number of transitions were determined: 22 of the M 4, 5 spectrum, 14 of the M 2, 3 spectrum and 2 of the M 1 spectrum. Only in the case of the M 2, 3 spectrum a comparison between the relative intensities, determined experimentally, and those calculated by Rubenstein for Z=47 was possible. The agreement is only qualitatively. Moreover, from the Auger electron energies measured, the following binding energies were calculated: E( M 1)=(292,1±1,0) eV, E( M 2)=(222,1±0,6) eV, E( M 3)=(214,6±0,6)eV, E( N 1 N 1)=(62,81±0,05) eV.