An automatic analysis device that analyzes a sample, the device comprising: a dispensing probe that aspirates or discharges the sample; a pressure sensor that measures a pressure in the dispensing probe; a controller that controls an operation of the dispensing probe; and a storage unit that stores a normal waveform parameter representing a waveform of the pressure measured by the pressure sensor after the dispensing probe normally ends aspiration of the sample, wherein the dispensing probe has a flow path filled with the sample and a plunger that aspirates or discharges the sample by applying a pressure to the sample filling the flow path, the controller acquires a measurement result of the pressure sensor after the dispensing probe ends aspiration of the sample, and specifies a measurement result parameter representing a waveform of the pressure based on the measurement result, the controller compares the normal waveform parameter and the measurement result parameter, the controller is configured to calculate a parameter specifying a length (L4, L5) along the flow path of the sample filling inside the dispensing probe and to determine whether or not a first length along the flow path of the sample filling inside the dispensing probe is shorter than a second length along the flow path of the sample filling inside the dispensing probe when the sample is normally aspirated, and when the controller determines that the first length is shorter than the second length, the controller outputs a signal representing that the dispensing probe does not normally aspirate the sample, characterized in that during a period from when the flow path is filled with the sample to when the dispensing probe is pulled up from the sample, the controller moves the plunger in a direction in which the sample is discharged by a distance where the sample in the flow path is not completely discharged, and the controller acquires one or more maximum values and one or more minimum values of the pressure during a period from when the plunger is moved by the distance to when the dispensing probe is pulled up from the sample, when the difference between the maximum value and the minimum value is in a predetermined threshold range, the controller determines that the dispensing probe normally aspirates the sample, and when the difference between the maximum value and the minimum value is outside of the predetermined threshold range, the controller outputs a signal representing that the dispensing probe does not normally aspirate the sample. a dispensing probe that aspirates or discharges the sample; a pressure sensor that measures a pressure in the dispensing probe; a controller that controls an operation of the dispensing probe; and a storage unit that stores a normal waveform parameter representing a waveform of the pressure measured by the pressure sensor after the dispensing probe normally ends aspiration of the sample, wherein the dispensing probe has a flow path filled with the sample and a plunger that aspirates or discharges the sample by applying a pressure to the sample filling the flow path, the controller acquires a measurement result of the pressure sensor after the dispensing probe ends aspiration of the sample, and specifies a measurement result parameter representing a waveform of the pressure based on the measurement result, the controller compares the normal waveform parameter and the measurement result parameter, the controller is configured to calculate a parameter specifying a length (L4, L5) along the flow path of the sample filling inside the dispensing probe and to determine whether or not a first length along the flow path of the sample filling inside the dispensing probe is shorter than a second length along the flow path of the sample filling inside the dispensing probe when the sample is normally aspirated, and when the controller determines that the first length is shorter than the second length, the controller outputs a signal representing that the dispensing probe does not normally aspirate the sample, characterized in that during a period from when the flow path is filled with the sample to when the dispensing probe is pulled up from the sample, the controller moves the plunger in a direction in which the sample is discharged by a distance where the sample in the flow path is not completely discharged, and the controller acquires one or more maximum values and one or more minimum values of the pressure during a period from when the plunger is moved by the distance to when the dispensing probe is pulled up from the sample, when the difference between the maximum value and the minimum value is in a predetermined threshold range, the controller determines that the dispensing probe normally aspirates the sample, and when the difference between the maximum value and the minimum value is outside of the predetermined threshold range, the controller outputs a signal representing that the dispensing probe does not normally aspirate the sample.