Three sets of spectra (in all 85 spectra) of the well-known standard and high eccentricity spectroscopic binary star Beta Ari were taken with the Boller and Chivens grating spectrography (29 and 35 Å mm-1) applied to the 137 cm reflector of the Merate Astronomical Observatory. These sets were takenduring the periastron passage of 14 15 November 1976,after the periastron passage of 2 3 October 1977 and before the apastron passage of 23 November 1977. The analysis of the radial velocitiesRV and equivalent widthsW λ of hydrogen and metal lines show periodic variations similar to those of some classical Delta Scuti stars. The variations of the asymmetries of the profiles of H and Ca ii K lines, linked to the variations of theRV seem to recall the Schuster effect observed in classical Cepheids. A periastron effect appears from: (a) increased amplitudes of theRV curves, (b) remarkable variations of the averagedW λ curves, (c) strong positive asymmetry (blue wing larger than red wing) in the Hγ and Ca ii K lines. A faint ‘bump’ inRV andW λ curves of Ca ii K line is singled out and could be in agreement with some theoretical forecasts of Aleshin (1964).