Summary of determinations of the black hole mass in RE J1034+396: from LF or HF higher or lower resonance interpretation of the X-ray QPO, from the broadband fitting of the optical/UV/X-ray spectra with starlight and disk/corona model, from line stellar absorption feature width, from emission lines from NLR ([OIII)] and BLR (Hβ and Mg II), and from the X-ray excess variance method.