This paper describes the issue of analysis of spontaneous speech in Japanese in the scheduling task and the procedure of transcription and segmentation into words. The experiment of meaning extraction was conducted using the corpus of spontaneous speech in the scheduling task which is suitable for the research on spontaneous dialog processing. The framework of semantic lexicon and the structure of semantic caseframe which focuses the verbal words in phrase are described. The results of the preliminary experiment of the meaning extraction of the spontaneous speech in the scheduling task dialogue are shown.