A transfer ticket used when changing trains or buses; a ticket permitting a transfer.
窓口で乗換券を買ってから新幹線に乗った。
I bought a transfer ticket at the counter and then boarded the Shinkansen.
この切符には乗換券が含まれているので、改めて買う必要はない。
This ticket includes a transfer ticket, so you don't need to buy one separately.
駅員に乗換券を提示して改札を通った。
I showed the transfer ticket to the station staff and passed through the ticket gate.