There is disclosed an NMR detector permitting NMR measurements to be performed well by making use of the merit of a meander coil if a trace amount of solution sample is investigated. Furthermore, an NMR spectrometer equipped with this detector is offered. The NMR detector comprises a planar sample cell and a planar detection coil disposed close to the sample cell. The sample cell has parallel, elongated sample spaces in connection with each other. The detection coil consists of a continuous elongated conductor repeatedly bent into segments which are substantially parallel to the sample spaces. Each of the segments has a major axis in the longitudinal direction of each of the sample spaces.