The unstaffed station consists of two side platforms serving two tracks.
Accidents
A 15-year-old junior high school student was killed at the station on 26 December 2011 after being hit by the non-stop Super Hokuto No. 9 limited express train service from Hakodate to Sapporo while crossing the tracks with a bicycle.[1]
^苫小牧のJR糸井駅で人身事故 男子中学生死亡 [Junior high schoolboy killed in accident at JR Itoi station in Tomakomai]. Web Minpo (in Japanese). Tomakomai, Japan: The Tomakomaimimpo Co., Ltd. 27 December 2011. Retrieved 23 February 2012.