PROBLEM TO BE SOLVED: To provide a work vehicle and an automatic stop system of the work vehicle with safety improved through more reliable surrounding obstacle detection.SOLUTION: There are provided: a travel vehicle body 10 which includes an operation part and a power source 321 for a travel part； a communication unit 110 which is capable of performing transmission and reception of a signal to and from a portable communication terminal 3； and a control part 100 which is capable of controlling the travel part based on the signal received from the portable communication terminal 3 by the communication unit 110. A plurality of communication systems R are provided between the communication unit 110 and the portable communication terminal 3, and the plurality of communication systems R include: a first communication system R1 which is capable of transmitting a first signal from the portable communication terminal 3； and a second communication system R2 which has a narrower communication range than the first communication system R1 and which is capable of receiving a second signal indicating the presence of the portable communication terminal 3 within a predetermined range S.SELECTED DRAWING: Figure 1【課題】より確実に周辺の障害物を検出することにより安全性を向上させた作業車両および作業車両の自動停止システムを提供する。【解決手段】作業部および走行部への動力源３２１を備える走行車体１０と、携帯通信端末３との間で信号の送受信が可能な通信ユニット１１０と、通信ユニット１１０が受信した携帯通信端末３からの信号に基づいて走行部を制御可能な制御部１００とを備える。通信ユニット１１０と携帯通信端末３との間には複数の通信系統Ｒが設けられ、複数の通信系統Ｒは、携帯通信端末３から第１の信号を送信可能な第１の通信系統Ｒ１と、第１の通信系統Ｒ１よりも通信範囲が狭く、携帯通信端末３が所定の範囲Ｓ内に存在することを示す第２の信号を受信可能な第２の通信系統Ｒ２とを含む。【選択図】図１
