To provide a pen-shaped signal transmitter with successful operability regarding channel setting and volume setting.
The signal transmitter is provided with a transmitting part 401 provided at a pen nib 41 of a pen 4, a first operation part 430 which is provided at a pen nib 43 of the pen 4 and is rotated centering around a central axis ca of the pen 4, a second operation part 420 which is provided at a pen axis 42 between the transmitting part 410 and the first operation part 430 and moves in the direction along the central axis ca in the direction along the central axis ca and a control part 400 which makes the transmitting part 410 transmit a volume setting signal according to rotation of the first operation part 430 and makes the transmitting part 410 transmit a channel setting signal according to transfer of the second operation part 420 in the direction along the central axis ca.
WATANABE MASAYASU
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