Radio equipment comprising: a substrate on which a first antenna for near field communication is provided; a base portion on which the substrate is erected; and a cover portion configured to be attached to the base portion so as to cover the substrate , wherein the cover portion comprises an opposing portion configured to oppose the first antenna and a non-opposing portion disposed closer to the base portion than the opposing portion in a direction in which the substrate is erected, wherein a distance (D1) from an outer surface of the cover portion to the substrate at the opposing portion is shorter than a distance (D2) from the outer surface of the cover portion to the substrate at the non-opposing portion ; and. wherein a mark is formed on the opposing portion , the mark indicating a position where the first antenna is disposed; wherein the cover portion comprises a substrate holding portion configured to dispose the first antenna to oppose the mark , and wherein the base portion has a circular disc shape and comprises a screwing mechanism configured to screw the cover portion to an outer circumferential surface of the base portion , the radio equipment further comprising a rotation restricting mechanism configured to restrict a relative rotation occurring between the base portion and the cover portion about a screw due to the screwing mechanism , wherein the rotation restricting mechanism is formed by a pair of cutaways that is formed on the outer circumferential surface of the base portion , and an engaging groove that is formed inside the cover portion , and wherein a pair of side surfaces of the engaging groove are configured to slide on the pair of cutaways in a direction in which the substrate is erected, whereby the rotation restricting mechanism is configured to guide the base portion and the cover portion for attachment to or detachment from each other in the direction in which the substrate is erected. a substrate on which a first antenna for near field communication is provided; a base portion on which the substrate is erected; and a cover portion configured to be attached to the base portion so as to cover the substrate , wherein the cover portion comprises an opposing portion configured to oppose the first antenna and a non-opposing portion disposed closer to the base portion than the opposing portion in a direction in which the substrate is erected, wherein a distance (D1) from an outer surface of the cover portion to the substrate at the opposing portion is shorter than a distance (D2) from the outer surface of the cover portion to the substrate at the non-opposing portion ; and. wherein a mark is formed on the opposing portion , the mark indicating a position where the first antenna is disposed; wherein the cover portion comprises a substrate holding portion configured to dispose the first antenna to oppose the mark , and wherein the base portion has a circular disc shape and comprises a screwing mechanism configured to screw the cover portion to an outer circumferential surface of the base portion , the radio equipment further comprising a rotation restricting mechanism configured to restrict a relative rotation occurring between the base portion and the cover portion about a screw due to the screwing mechanism , wherein the rotation restricting mechanism is formed by a pair of cutaways that is formed on the outer circumferential surface of the base portion , and an engaging groove that is formed inside the cover portion , and wherein a pair of side surfaces of the engaging groove are configured to slide on the pair of cutaways in a direction in which the substrate is erected, whereby the rotation restricting mechanism is configured to guide the base portion and the cover portion for attachment to or detachment from each other in the direction in which the substrate is erected. <EOS>