An analyzing device having a microchannel structure for transferring a sample liquid to a measurement spot by a centrifugal force generated by rotationally driving the analyzing device about a rotational axis, the analyzing device being used for reading that accesses a reaction liquid at the measurement spot, the analyzing device comprising: a liquid storage chamber configured to receive the sample liquid and to transferr the received sample liquid by the centrifugal force generated by rotationally driving the analyzing device about the rotational axis; a first reserving cavity connected to the liquid storage chamber via a communicating passage, the first reserving cavity is configured to receive the sample liquid passed through the communicating passage and to retain the sample liquid transferred by the centrifugal force; an operation cavity adjacent to the first reserving cavity in a circumferential direction of the rotational driving with respect to the rotational axis; a connecting section, connecting the first reserving cavity and the operation cavity, provided on a side wall of the first reserving cavity, the connecting section configured to suck, by a capillary force, the sample liquid retained in the first reserving cavity and, when the device is stopped or decelerated, transfer the sample liquid to the operation cavity; and a second reserving cavity (247, 248) that is disposed on the outer periphery of the operation cavity in the radial direction with respect to the rotational axis, communicates with an outermost position of the operation cavity via a connecting passage, and configured to retain the sample liquid transferred from the operation cavity by the centrifugal force, wherein circumferential end of the connecting section extends to the outermost periphery of the first reserving cavity and farther than a liquid level of the sample liquid retained in the first reserving cavity, with respect to the rotation axis, wherein the operation cavity contains first reagents (249, 250) applied in the operation cavity, the first reagents (249, 250) arranged in the circumferential direction and an agitating rib extending between the first reagents (249, 250). a liquid storage chamber configured to receive the sample liquid and to transferr the received sample liquid by the centrifugal force generated by rotationally driving the analyzing device about the rotational axis; a first reserving cavity connected to the liquid storage chamber via a communicating passage, the first reserving cavity is configured to receive the sample liquid passed through the communicating passage and to retain the sample liquid transferred by the centrifugal force; an operation cavity adjacent to the first reserving cavity in a circumferential direction of the rotational driving with respect to the rotational axis; a connecting section, connecting the first reserving cavity and the operation cavity, provided on a side wall of the first reserving cavity, the connecting section configured to suck, by a capillary force, the sample liquid retained in the first reserving cavity and, when the device is stopped or decelerated, transfer the sample liquid to the operation cavity; and a second reserving cavity (247, 248) that is disposed on the outer periphery of the operation cavity in the radial direction with respect to the rotational axis, communicates with an outermost position of the operation cavity via a connecting passage, and configured to retain the sample liquid transferred from the operation cavity by the centrifugal force, wherein circumferential end of the connecting section extends to the outermost periphery of the first reserving cavity and farther than a liquid level of the sample liquid retained in the first reserving cavity, with respect to the rotation axis, wherein the operation cavity contains first reagents (249, 250) applied in the operation cavity, the first reagents (249, 250) arranged in the circumferential direction and an agitating rib extending between the first reagents (249, 250).