An automatic analyzer comprising: a tube pump (32, 223, 224) configured to deliver a liquid from a liquid bottle (30, 221, 222) accommodating the liquid to a liquid delivery target container; a mounting unit configured to mount the liquid delivery target container; a liquid surface detecting unit configured to detect a liquid surface of the liquid in the liquid delivery target container; and a control unit, wherein: the tube pump (32, 223, 224) is configured to deliver the liquid to the liquid delivery target container during a design liquid delivery time (Ti) necessary to deliver the liquid in a design liquid delivery amount (Vi) before the tube pump (32, 223, 224) is degraded; and the control unit being configured to determine a degradation state of the tube pump (32, 223, 224) based on the design liquid delivery amount (Vi) and an actual liquid delivery amount, characterised in that: the automatic analyzer comprises a drive mechanism configured to drive the mounting unit in a vertical direction; the drive mechanism is configured to move the mounting unit mounting the liquid delivery target container to which the liquid has been delivered from a first position to a second position at which the liquid surface is to be detected by the liquid surface detecting unit; the control unit is configured to compute the actual liquid delivery amount (Vr) of the liquid for the design liquid delivery time (Ti) based on the first position and the second position; and the control unit is configured to compute an actual liquid delivery time (Tr) necessary to deliver the liquid in the design liquid delivery amount (Vi) based on the actual liquid delivery amount (Vr) and the design liquid delivery amount (Vi). a tube pump (32, 223, 224) configured to deliver a liquid from a liquid bottle (30, 221, 222) accommodating the liquid to a liquid delivery target container; a mounting unit configured to mount the liquid delivery target container; a liquid surface detecting unit configured to detect a liquid surface of the liquid in the liquid delivery target container; and a control unit, wherein: the tube pump (32, 223, 224) is configured to deliver the liquid to the liquid delivery target container during a design liquid delivery time (Ti) necessary to deliver the liquid in a design liquid delivery amount (Vi) before the tube pump (32, 223, 224) is degraded; and the control unit being configured to determine a degradation state of the tube pump (32, 223, 224) based on the design liquid delivery amount (Vi) and an actual liquid delivery amount, characterised in that: the automatic analyzer comprises a drive mechanism configured to drive the mounting unit in a vertical direction; the drive mechanism is configured to move the mounting unit mounting the liquid delivery target container to which the liquid has been delivered from a first position to a second position at which the liquid surface is to be detected by the liquid surface detecting unit; the control unit is configured to compute the actual liquid delivery amount (Vr) of the liquid for the design liquid delivery time (Ti) based on the first position and the second position; and the control unit is configured to compute an actual liquid delivery time (Tr) necessary to deliver the liquid in the design liquid delivery amount (Vi) based on the actual liquid delivery amount (Vr) and the design liquid delivery amount (Vi). the tube pump (32, 223, 224) is configured to deliver the liquid to the liquid delivery target container during a design liquid delivery time (Ti) necessary to deliver the liquid in a design liquid delivery amount (Vi) before the tube pump (32, 223, 224) is degraded; and the control unit being configured to determine a degradation state of the tube pump (32, 223, 224) based on the design liquid delivery amount (Vi) and an actual liquid delivery amount, characterised in that: the automatic analyzer comprises a drive mechanism configured to drive the mounting unit in a vertical direction; the drive mechanism is configured to move the mounting unit mounting the liquid delivery target container to which the liquid has been delivered from a first position to a second position at which the liquid surface is to be detected by the liquid surface detecting unit; the control unit is configured to compute the actual liquid delivery amount (Vr) of the liquid for the design liquid delivery time (Ti) based on the first position and the second position; and the control unit is configured to compute an actual liquid delivery time (Tr) necessary to deliver the liquid in the design liquid delivery amount (Vi) based on the actual liquid delivery amount (Vr) and the design liquid delivery amount (Vi). the automatic analyzer comprises a drive mechanism configured to drive the mounting unit in a vertical direction; the drive mechanism is configured to move the mounting unit mounting the liquid delivery target container to which the liquid has been delivered from a first position to a second position at which the liquid surface is to be detected by the liquid surface detecting unit; the control unit is configured to compute the actual liquid delivery amount (Vr) of the liquid for the design liquid delivery time (Ti) based on the first position and the second position; and the control unit is configured to compute an actual liquid delivery time (Tr) necessary to deliver the liquid in the design liquid delivery amount (Vi) based on the actual liquid delivery amount (Vr) and the design liquid delivery amount (Vi).