[en] The emission lines Hα, Hβ+[OIII], and Lα have been observed in the high-redshift quasar 1225+31. The ratios of line intensities in 1225+31 are found to be Lα/Hαapprox.0.8, Hα/(Hβ+[OIII]) approx.4, and 4< Hα/Hβ<10. The observed value of Lα/Hα agrees well with the ratio derived by Baldwin on the basis of a composite quasar spectrum, and with direct determination of this ratio in 3C 273 and PKS 0237--23. The ratio Hα/Hβ is in the range of values found for a sample of low-redshift quasars by Baldwin. The low value for the Lα/Hα ratio cannot be reasonably explained by foreground extinction between the Sun and 1225+31