Korean psych verb constructions are divided into two different types: agentive psych verb constructions and stative psych verb constructions. A considerable amount of literature has been devoted to explaining the different case-marking patterns of the two constructions. Building on the HPSG feature regime, I propose two types of semantic relations, i.e. the act-relation for agentive psych verbs and the psych-relation for stative psych verbs. Such different semantic relations explain the different cases that the verbs’ objects are marked with. In addition, I show that the proposed analysis well explains scope interpretation, polysemy relations, and verb alternation of the two constructions.