Provided is a small urinometer that can easily and accurately measure urine flow rate and urine flow rate. On the lower end side of the urine channel tube 20 through which urine collected by the urine collection unit 2 flows, a water wheel 7 that rotates by the flow of urine that exits the urine channel tube 20 is provided. The shape of the tip of the urine channel tube 20 where urine is applied to the water wheel is formed into a nozzle portion 22 whose tip side is processed at an acute angle and an opening 21 is formed on the side wall surface on the tip side. A guide 23 extended in the longitudinal direction of the nozzle portion 22 is provided in the urine flow channel between the side wall surface opposite to the opening 21 of the nozzle portion 22, and the tip thereof is the tip side region of the urine flow channel tube 20. Extend to the end. The tip of the guide 23 is tapered and formed obliquely, and urine flowing through the urine channel tube 20 is introduced into the nozzle portion 22 and guided by the guide 23, and after being guided to the tip of the guide 23, on the tip side of the guide 23. Collected so as to hit the tip of the blade of the water turbine 7. The water wheel 7 is rotated by the flow of urine, and the urine flow rate can be detected based on the rotation detection information.尿流量や尿流速を容易に正確に計れる小型の尿流計を提供する。 採尿部２により採尿される尿が流れる尿流路管２０の下端側に、尿流路管２０を出る尿の流れによって回転する水車７を設ける。尿流路管２０の水車に尿を当てる先端部の形状を、その先端側を鋭角的に加工して、先端側の側壁面に開口部２１が形成されたノズル部２２と成す。ノズル部２２の開口部２１と反対側の側壁面間との尿流路内に、ノズル部２２の長手方向に伸長されたガイド２３を設けて、その先端を尿流路管２０の先端側領域まで伸長配置する。ガイド２３の先端は先細状に斜めに形成し、尿流路管２０を流れる尿がノズル部２２に導入されてガイド２３にガイドされ、ガイド２３の先端に導かれた後にガイド２３の先端側で集められて水車７の羽根の先端側に当たるようにする。尿の流れで水車７を回転させ、その回転検出情報に基づき尿流量を検出できるようにする。
