Highlyenantioselectiveco-catalyticdirectaldolreactions by a combination of simple hydrophobic acyclicaminoacid and hydrogen-bonddonatingcatalysts are presented. The corresponding aldol products are formed in high yields with high regio-, diastereo- (anti or syn) and enantioselectivity (up to 99.5:0.5 er). The catalyst loadings can be decreased to as little as 2 mol%.