A biological information measurement device having a main body housing, a band portion in which a plurality of electrodes are disposed and which is used to attach the main body housing to a human body, and a detachable band cover formed of a non-conductive material and configured to be able to cover at least a contact surface of the band portion on a side that comes in contact with a human body. The electrodes each include a protrusion portion provided to protrude from the contact surface of the band portion. The band cover includes a plurality of opening portions, each of the opening portions being through which the protrusion portion of the electrode is provided to protrude. The electrode and the opening portion are configured such that the opening portion is covered by the protrusion portion of the electrode when the band portion is covered by the band cover.