This work analyses some correlations or associations between certain features of solar radio bursts at 600 Mc/s and of associated chromospheric flares respectively. Subject of the analysis are 149 radio events observed at the Humain station and 125 associated flares observed at Uccle during the years 1957–61. It is found that the radioelectric energy of the bursts is associated with the eruptive area and the Hα intensity of the flares, whereas the duration of the bursts is associated with the Hα broadening. For bursts connected with a second phase, the eruptive area and the importance of the magnetic field have a bearing on the characteristics of the radio event.