PROBLEM TO BE SOLVED: To provide a sample for calibration of Trelaxation time and/or Trelaxation time inH-NMR.SOLUTION: The sample 1 is provided for calibration of Trelaxation time and Trelaxation time inH-NMR. The sample includes a porous material 3 in which a liquid 13 including a molecule containing proton (H) with its Trelaxation time and Trelaxation time ofH-NMR in an measuring object to be measured is impregnated into a fine pore 11, and an encapsulating material 5 with the porous material 3 enclosed.