A work vehicle including an engine, a hydraulic brake device configured to generate a braking force in response to a pressure of a hydraulic oil, and a brake pedal configured to operate the brake device, the work vehicle comprising: at least one of a brake pedal operation amount sensor configured to detect an operation amount of the brake pedal and a brake pressure sensor configured to detect a pressure of a hydraulic oil supplied to the brake device; a cooling oil temperature sensor configured to detect a temperature of a cooling oil that cools the brake device; a vehicle speed sensor configured to detect a vehicle speed; a notification device configured to notify an operator of information about a temperature of the cooling oil; and a controller configured to control the notification device, wherein the controller is configured to compare each detection value detected from at least one of the brake pedal operation amount sensor and the brake pressure sensor and the vehicle speed sensor to each predetermined threshold corresponding to each of the sensors (25,26,15), and is configured to output, in a case where at least one of the detection values is equal to or more than the threshold, a warning command indicating high possibility of overheating of a temperature of the cooling oil to the notification device, wherein the work vehicle further comprises: an accelerator pedal configured to adjust a rotation speed of the engine; an accelerator pedal operation amount sensor configured to detect an operation amount of the accelerator pedal; and an engine rotation speed sensor configured to detect a rotation speed of the engine, wherein the controller is configured to output a warning command that a temperature of the cooling oil is likely to overheat to the notification device in a case where a state that a detection value from the vehicle speed sensor is equal to or more than a first threshold, a detection value from the brake pedal operation amount sensor or the brake pressure sensor is equal to or more than a second threshold and a detection value from the accelerator pedal operation amount sensor or a detection value from the engine rotation speed sensor is equal to or more than a third threshold continues for a first duration or more. at least one of a brake pedal operation amount sensor configured to detect an operation amount of the brake pedal and a brake pressure sensor configured to detect a pressure of a hydraulic oil supplied to the brake device; a cooling oil temperature sensor configured to detect a temperature of a cooling oil that cools the brake device; a vehicle speed sensor configured to detect a vehicle speed; a notification device configured to notify an operator of information about a temperature of the cooling oil; and a controller configured to control the notification device, wherein the controller is configured to compare each detection value detected from at least one of the brake pedal operation amount sensor and the brake pressure sensor and the vehicle speed sensor to each predetermined threshold corresponding to each of the sensors (25,26,15), and is configured to output, in a case where at least one of the detection values is equal to or more than the threshold, a warning command indicating high possibility of overheating of a temperature of the cooling oil to the notification device, an accelerator pedal configured to adjust a rotation speed of the engine; an accelerator pedal operation amount sensor configured to detect an operation amount of the accelerator pedal; and an engine rotation speed sensor configured to detect a rotation speed of the engine, wherein the controller is configured to output a warning command that a temperature of the cooling oil is likely to overheat to the notification device in a case where a state that a detection value from the vehicle speed sensor is equal to or more than a first threshold, a detection value from the brake pedal operation amount sensor or the brake pressure sensor is equal to or more than a second threshold and a detection value from the accelerator pedal operation amount sensor or a detection value from the engine rotation speed sensor is equal to or more than a third threshold continues for a first duration or more.