An organocatalytic asymmetric Michaeladdition of ketones to alkylidenemalonates has been developed. In the presence of 20 mol % of urea 1a or N-(pyrrolidin-2-ylmethyl)trifluoromethanesulfonamide 1j, the reactions of ketones with alkylidenemalonates afford the desired Michael adducts in moderate to good yields with good to high enantioselectivities under mild conditions.