PROBLEM TO BE SOLVED: To eliminate useless stress factor on a milk cow, to reduce the onset of mastitis or the like by the entrance of various germs to the nipple, to suppress the useless formation of bubbles, and to secure the milk transportation in stable balance.SOLUTION: The milk volume meter 1 is equipped with a measuring container section 2 connected to the midway of a milk transfer line Lm, and capable of storing the milk M flowing in from an inlet 2i, a liquid surface-detection section 3 for detecting the liquid surface Mu of the milk M stored in the inside of the measuring container section 2, and a valve mechanism section 4 capable of opening or closing the outlet 2e of the measuring container section 2. A gas-liquid mixing buffer chamber Rd having a volume capable of storing the milk flowed out from the outlet 2e by the opening and closing of the valve mechanism section 4 at least in an amount of one time is installed in the downstream side of the outlet 2e, and a milk delivery outlet section 6 having a delivery outlet 6f for sending out the milk M in a flowing quantity not higher than a prescribed flow rate Qf while mixing the milk M with air A present in the interior of the measuring container section 2 is installed in the gas-liquid mixing buffer chamber Rd when constituting the milk volume meter 1.COPYRIGHT: (C)2011,JPO&INPIT【課題】 乳牛に対する無用なストレス要因の解消、更には乳頭に雑菌が入り込むことによる乳房炎等の発生を解消する。気泡の無用な発生の抑制、更には安定したバランスのよい送乳の確保を実現する。【解決手段】 送乳ラインLmの中途に接続し、流入口2iから流入する乳Mを貯留可能な計量容器部2と、計量容器部2の内部に貯留される乳Mの液面Muを検出する液面検出部3と、計量容器部2の流出口2eを開閉可能な弁機構部4を備える乳量計1を構成するに際して、流出口2eの下流側に、弁機構部4の開閉により流出口2eから流出した少なくとも一回分の乳量を貯留可能な容積を有する気液混合緩衝室Rdを設けるとともに、当該気液混合緩衝室Rdに、所定流量Qf以下の流量により乳Mを流出させ、かつ計量容器部2の内部の空気Aに混合して送り出す送出口6fを有する乳送出口部6を設ける。【選択図】 図1