Abstract: Disclosed is a hose strangler which considerably reduces the risk of slippage when the strangler is being removed from the hose. The hose strangler includes a clamping member adapted to hold a hose in position. The clamping member has a first arm having a concave portion for receiving the hose and a second arm having a convex portion matching the concave portion of the first arm, the concave and convex portions defining a hose strangling area, where the first and second arms are pivotally secured at a first end so as to permit the clamping member to rotate between a closed position and an opened position. A blocking mechanism to open and close an opening between the first and second arms is also provided, where the blocking mechanism is located in the hose strangling area. A locking mechanism is also provided for securing the clamping member in a closed position.