Hydrogenation of crotonaldehyde in a gas phase at atmospheric pressure over Pt/Ga 2 O 3 catalysts was studied. Two types of platinum precursors [Pt(acac) 2 and H 2 PtCl 6 ] and two gallia supports (α-Ga 2 O 3 [60.7 m 2 /g] and β-Ga 2 O 3 [2.2 m 2 /g]) were used for catalyst preparation. The catalyst 5 wt% Pt/α-Ga 2 O 3 prepared from Pt(acac) 2 precursor showed very high and stable selectivity to crotyl alcohol (91% and 63% at 10% and 70% crotonaldehyde conversion, respectively). Because Pt-supported catalysts, showing a high selectivity, usually have relatively low activity, the most interesting finding of this study is that the use of gallium oxide as a support for platinum makes it possible to obtain catalysts with significantly increased CO bond hydrogenation selectivity while maintaining high activity.