the same scanning probe microscope and sample observation method using

The purpose of the present invention is to increase the detected light amount of the near-field light which is generated in a liquid between a measurement probe and to the sample under investigation, with the use of a Rasternahfeldmikroskops for measurement in a liquid, and improving the measurement reproducibility and the signal-to-noise ratio of Nahfeldlichtbildern. The present invention provides a scanning probe microscope ready, comprising a measuring probe for relatively scanning a sample to be tested, a laser beam irradiation system for irradiating the probe with a laser beam, a sample cell containing the to be assayed sample and scattered light of the by laser beam irradiation between the measuring probe and the near-field light generated at the sample to pass through, and a detector which detects the scattered light that passes through the sample cell.