An automatic analyzer comprising: a member (13, 15, 16) to be washed that is any one of a reagent probe for dispensing a reagent into a reaction cell, a sample probe for dispensing a sample into a reaction cell, and a stirring mechanism for contacting and stirring a liquid in a reaction cell; a wash station (18, 20, 22) in which the member (13, 15, 16) to be washed is washed with a washing liquid; a measuring part for measuring an optical characteristic of an evaluation reagent contained in a reaction cell; and a control unit for controlling the member (13, 15, 16) to be washed, the wash station (18, 20, 22) and the measuring part, wherein the control unit brings the member (13, 15, 16) to be washed that has been washed in the wash station (18, 20, 22) into contact with the evaluation reagent, and the control unit causes the measuring part to measure the optical characteristic after the contact with the evaluation reagent, and calculates the amount of the washing liquid carried into the reaction cell by the member (13, 15, 16) to be washed, based on the measured optical characteristic, characterized in that the automatic analyzer further comprises a water drop removing mechanism (19, 21, 23) that operates to remove the washing liquid adhered to the member (13, 15, 16) to be washed, after the member (13, 15, 16) to be washed has been washed with the washing liquid, the control unit brings the member (13, 15, 16) to be washed into contact with the evaluation reagent after the operation of removing the washing liquid adhered to the member (13, 15, 16) to be washed has been conducted by the water drop removing mechanism (19, 21, 23), and the control unit, before causing the measuring part to measure the optical characteristic after the contact with the evaluation reagent, performs a control such as to cause the member (13, 15, 16) to be washed to reciprocate between the same reaction cell and the wash station (18, 20, 22) a plural number of times, and performs a control such as to repeat a series of opera- tions inclusive of an operation of washing the member (13, 15, 16) to be washed with the washing liquid, an operation of removing the washing liquid adhered to the member (13, 15, 16) to be washed by the water drop removing mechanism (19, 21, 23), and an operation of bringing the member (13, 15, 16) to be washed into contact with the evaluation reagent. a member (13, 15, 16) to be washed that is any one of a reagent probe for dispensing a reagent into a reaction cell, a sample probe for dispensing a sample into a reaction cell, and a stirring mechanism for contacting and stirring a liquid in a reaction cell; a wash station (18, 20, 22) in which the member (13, 15, 16) to be washed is washed with a washing liquid; a measuring part for measuring an optical characteristic of an evaluation reagent contained in a reaction cell; and a control unit for controlling the member (13, 15, 16) to be washed, the wash station (18, 20, 22) and the measuring part, wherein the control unit brings the member (13, 15, 16) to be washed that has been washed in the wash station (18, 20, 22) into contact with the evaluation reagent, and the control unit causes the measuring part to measure the optical characteristic after the contact with the evaluation reagent, and calculates the amount of the washing liquid carried into the reaction cell by the member (13, 15, 16) to be washed, based on the measured optical characteristic, characterized in that the automatic analyzer further comprises a water drop removing mechanism (19, 21, 23) that operates to remove the washing liquid adhered to the member (13, 15, 16) to be washed, after the member (13, 15, 16) to be washed has been washed with the washing liquid, the control unit brings the member (13, 15, 16) to be washed into contact with the evaluation reagent after the operation of removing the washing liquid adhered to the member (13, 15, 16) to be washed has been conducted by the water drop removing mechanism (19, 21, 23), and the control unit, before causing the measuring part to measure the optical characteristic after the contact with the evaluation reagent, performs a control such as to cause the member (13, 15, 16) to be washed to reciprocate between the same reaction cell and the wash station (18, 20, 22) a plural number of times, and performs a control such as to repeat a series of opera- tions inclusive of an operation of washing the member (13, 15, 16) to be washed with the washing liquid, an operation of removing the washing liquid adhered to the member (13, 15, 16) to be washed by the water drop removing mechanism (19, 21, 23), and an operation of bringing the member (13, 15, 16) to be washed into contact with the evaluation reagent.