A biological information measuring panel 1 has an elastically flexible laying plate portion 2 to be disposed below a subject. A strain detecting sensor D is attached to the laying plate portion 2 . Strain changes of the laying plate portion 2 generated in accordance with biological activities of the subject S are detected by the strain detecting sensor D in a state in which the laying plate portion 2 is disposed below the subject S. An output signal from the strain detecting sensor D is used to measure the biological information of the subject S.