This study aims to propose a method of investigating collocations in a French/Korean contrastive perspective, focusing on those related with speech acts, i.e. collocations of 'utterance‘. Firstly we investigate two features of collocations: selectional restriction and semantic transparency of the noun. The notion of support verb is proved particularly effective for the verb-noun pattern. Secondly we classify matchings between French and Korean collocations in three types: [1] collocation/collocation; [2] collocation / one lexical item; [3] collocation/idiom.