A process for preparing maltitol crystals by evapocrystallization, includes preparing a maltitol solution with a maltitol richness of at least 85% based on dry matter, preferably a maltitol richness of between 89% and 99% based on dry matter, and even more preferably a maltitol richness of between 93% and 95% based on dry matter; concentrating under vacuum maltitol solution in the evapocrystallizer so as to obtain a maltitol syrup whose degree of maltitol supersaturation is within the metastable zone of maltitol; seeding the supersaturated maltitol solution with a maltitol seed crystal in dispersed form; performing the crystallization while keeping constant the degree of maltitol supersaturation within the metastable zone of maltitol by controlling the conditions of temperature, the conditions of vigorous stirring by pumping of the evaporation vapors, and the conditions of feeding in of the maltitol syrup to be crystallized; and recovering the crystals thus obtained.