A method of measuring bio-information using a bio-information detecting apparatus, the apparatus comprising: a band member curved in a C-shape, the band member configured to be worn by an examinee to extend around a neck part of the examinee from a back side of the neck part toward both lateral sides of the neck part; and a pair of electrodes (4a, 4b) for cardiac potential measurement of the examinee, the pair of electrodes (4a, 4b) being disposed at respective positions on the left and right side of the band member so as to come into contact with right and left skin surfaces of the neck part of the examinee, the method comprising: attaching the band member to an examinee such that the electrode disposed on the left side of the band member is in contact with the left skin surface of the neck part of the examinee, and the right side of the band member is in contact with the right skin surface of the neck part of the examinee such that: the electrode located on the right of the examinee is located, with respect to the examinee, relatively more frontward than a position of the electrode located on the left of the examinee, the electrode on the right is disposed in a more frontward region on the band member than the right lateral mid point (Sr)of the neck part of the examinee, and the electrode on the left is disposed at a more backward position on the band member than the left lateral mid point of the neck part of the examinee. a band member curved in a C-shape, the band member configured to be worn by an examinee to extend around a neck part of the examinee from a back side of the neck part toward both lateral sides of the neck part; and a pair of electrodes (4a, 4b) for cardiac potential measurement of the examinee, the pair of electrodes (4a, 4b) being disposed at respective positions on the left and right side of the band member so as to come into contact with right and left skin surfaces of the neck part of the examinee, the method comprising: attaching the band member to an examinee such that the electrode disposed on the left side of the band member is in contact with the left skin surface of the neck part of the examinee, and the right side of the band member is in contact with the right skin surface of the neck part of the examinee such that: the electrode located on the right of the examinee is located, with respect to the examinee, relatively more frontward than a position of the electrode located on the left of the examinee, the electrode on the right is disposed in a more frontward region on the band member than the right lateral mid point (Sr)of the neck part of the examinee, and the electrode on the left is disposed at a more backward position on the band member than the left lateral mid point of the neck part of the examinee. the electrode located on the right of the examinee is located, with respect to the examinee, relatively more frontward than a position of the electrode located on the left of the examinee, the electrode on the right is disposed in a more frontward region on the band member than the right lateral mid point (Sr)of the neck part of the examinee, and the electrode on the left is disposed at a more backward position on the band member than the left lateral mid point of the neck part of the examinee.