A communication antenna unit comprising: a communication antenna (150, 160) formed of a conductor pattern (151, 161); a human body sensor formed of another conductor pattern (141, 142) separately from the communication antenna (150, 160); a single unit board on which the communication antenna (150, 160) and the human body sensor are formed, the single unit board comprising: a flat plane section; and a curved section formed adjacent to the flat plane section, wherein the communication antenna (150, 160) is formed in the flat plane section and the curved section, and wherein the communication antenna (150, 160) further includes: a first communication antenna that is configured by a first antenna conductor pattern formed on the unit board and adapted to transmit or receive a radio wave in a first frequency; and a second communication antenna that is configured by the first antenna conductor pattern and a second antenna conductor pattern that is formed adjacent to the first antenna conductor pattern on the unit board and configured to transmit or receive a radio wave in a second frequency, wherein a first reactance element connects the first antenna conductor pattern to the human body sensor, and one of the first and second communication antenna conductor patterns (151, 161) is at least partly formed in the curved section, and the other of the first and second communication antenna conductor patterns (151, 161) and the human body sensor are formed in the flat plane section, wherein the first communication antenna, the second communication antenna and the human body sensor are formed only on one surface side of the unit board. a communication antenna (150, 160) formed of a conductor pattern (151, 161); a human body sensor formed of another conductor pattern (141, 142) separately from the communication antenna (150, 160); a single unit board on which the communication antenna (150, 160) and the human body sensor are formed, the single unit board comprising: a flat plane section; and a curved section formed adjacent to the flat plane section, wherein the communication antenna (150, 160) is formed in the flat plane section and the curved section, and a flat plane section; and a curved section formed adjacent to the flat plane section, wherein the communication antenna (150, 160) is formed in the flat plane section and the curved section, and wherein the communication antenna (150, 160) further includes: a first communication antenna that is configured by a first antenna conductor pattern formed on the unit board and adapted to transmit or receive a radio wave in a first frequency; and a second communication antenna that is configured by the first antenna conductor pattern and a second antenna conductor pattern that is formed adjacent to the first antenna conductor pattern on the unit board and configured to transmit or receive a radio wave in a second frequency, wherein a first reactance element connects the first antenna conductor pattern to the human body sensor, and one of the first and second communication antenna conductor patterns (151, 161) is at least partly formed in the curved section, and the other of the first and second communication antenna conductor patterns (151, 161) and the human body sensor are formed in the flat plane section, wherein the first communication antenna, the second communication antenna and the human body sensor are formed only on one surface side of the unit board. a first communication antenna that is configured by a first antenna conductor pattern formed on the unit board and adapted to transmit or receive a radio wave in a first frequency; and a second communication antenna that is configured by the first antenna conductor pattern and a second antenna conductor pattern that is formed adjacent to the first antenna conductor pattern on the unit board and configured to transmit or receive a radio wave in a second frequency, wherein a first reactance element connects the first antenna conductor pattern to the human body sensor, and one of the first and second communication antenna conductor patterns (151, 161) is at least partly formed in the curved section, and the other of the first and second communication antenna conductor patterns (151, 161) and the human body sensor are formed in the flat plane section, wherein the first communication antenna, the second communication antenna and the human body sensor are formed only on one surface side of the unit board.