Cyclic amino compounds represented by general formula (I) or pharmacologically acceptable salts thereof having an excellent antiplatelet aggregation effect; etc. and thus being useful as preventives or remedies for embolism, thrombosis or arterial sclerosis wherein R1 represents optionally substituted phenyl; R2 represents optionally substituted aliphatic acyl, optionally substituted benzoyl or alkoxycarbonyl; and R3 represents substituted and optionally ring-fused saturated cyclic amino.