An automated analyzer according to an embodiment includes a probe. The probe has a step part configured to be provided between a lower shaft and an upper shaft, and to be formed such that the outer diameter changes. A descending controller lowers the probe from a predefined position that positions the step part above the liquid surface to an operating position that positions the step part below the liquid surface. A ascending controller raises the probe at a high speed from the operating position until immediately before the step part reaches the position of the liquid surface, subsequently raises the probe at a low speed until the step part passes through the liquid surface, and raises the probe at a higher speed than the low speed from immediately after the step part passes through the position of the liquid surface up to the predefined position.