A reducing agent container, comprising: a tank main body that accommodates a reducing agent; a heating member disposed in the tank main body and configured to generate heat so as to increase a temperature of the reducing agent; a covering member covering the heating member and having an inflow portion, the inflow portion allowing some of the reducing agent accommodated in the tank main body to flow into the covering member; a reducing agent supply pipe through which the reducing agent in the covering member is supplied to the outside of the tank main body; and a temperature measuring unit having a temperature sensor disposed in the covering member to sense a temperature of the reducing agent in the covering member, the temperature measuring unit determining the temperature sensed by the temperature sensor, wherein the covering member has an upper wall covering the heating member from above, the upper wall having a lower surface that is inclined so as to be raised toward the temperature sensor, wherein the heating member includes a heating medium supply pipe that guides a heating medium into the covering member and guides the heating medium inside the covering member to the outside of the covering member, the heating medium supply pipe having a shape returning inside the covering member, the reducing agent supply pipe has a suction portion located inside the covering member, the suction portion configured to suck the reducing agent in the covering member, and the suction portion and the temperature sensor are located in a region that is surrounded by the heating medium supply pipe inside the covering member, characterized in that the inflow portion brings the inside of the covering member into communication with the outside of the covering member, the covering member has a closure portion separating the inside of the covering member from the outside of the covering member, the heating medium supply pipe guides the heating medium to the inside of the covering member through the inflow portion, the heating medium supply pipe having the shape returning in a region closer to the closure portion than the inflow portion to guide the heating medium to the outside of the covering member through the inflow portion, and the lower surface of the upper wall is inclined so as to be raised from the closure portion toward the temperature sensor. a tank main body that accommodates a reducing agent; a heating member disposed in the tank main body and configured to generate heat so as to increase a temperature of the reducing agent; a covering member covering the heating member and having an inflow portion, the inflow portion allowing some of the reducing agent accommodated in the tank main body to flow into the covering member; a reducing agent supply pipe through which the reducing agent in the covering member is supplied to the outside of the tank main body; and a temperature measuring unit having a temperature sensor disposed in the covering member to sense a temperature of the reducing agent in the covering member, the temperature measuring unit determining the temperature sensed by the temperature sensor, wherein the covering member has an upper wall covering the heating member from above, the upper wall having a lower surface that is inclined so as to be raised toward the temperature sensor, wherein the heating member includes a heating medium supply pipe that guides a heating medium into the covering member and guides the heating medium inside the covering member to the outside of the covering member, the heating medium supply pipe having a shape returning inside the covering member, the reducing agent supply pipe has a suction portion located inside the covering member, the suction portion configured to suck the reducing agent in the covering member, and the suction portion and the temperature sensor are located in a region that is surrounded by the heating medium supply pipe inside the covering member, characterized in that the inflow portion brings the inside of the covering member into communication with the outside of the covering member, the covering member has a closure portion separating the inside of the covering member from the outside of the covering member, the heating medium supply pipe guides the heating medium to the inside of the covering member through the inflow portion, the heating medium supply pipe having the shape returning in a region closer to the closure portion than the inflow portion to guide the heating medium to the outside of the covering member through the inflow portion, and the lower surface of the upper wall is inclined so as to be raised from the closure portion toward the temperature sensor.