A measurement device that includes a plurality of lines for conveying a reaction container containing a sample and measures a predetermined material included in the sample while conveying the reaction container by the plurality of lines, wherein the plurality of lines include: a first reaction line for conveying a reaction container at a first convey speed; a second reaction line for conveying a reaction container at a second convey speed; and a measurement line for measuring a predetermined material included in a sample reacted with a reagent within the reaction container in the first reaction line and a sample reacted with a reagent within the reaction container in the second reaction line, the measurement line conveying the reaction containers at a third convey speed that is higher than the first convey speed and the second convey speed.