The purpose of this paper is to present an experimental study for constructing an annotated spoken dialogue corpus. Labels annotated on the corpus characterize surface forms and intentions of speaker's utterances. The first half of the paper deals with: (l)defining categories for the labels that represent illocutionary force types(IFTs) and phonological physical features(P/PFs) of utterances, and (2)howIFTs and P/PFs are annotated to a spoken dialogue corpus. In the latter half, the feasibility of and difficulties in carrying out this annotation process are discussed and some statistical data obtained from a spoken dialogue corpus selected from ASJ Continuous Speech Corpus, Volume 7 are shown.