A person who acts as a go-between or intermediary in transactions, negotiations, or communication.
As a trade intermediary, he brokered many contracts.
We decided to use an agent for the negotiations.
仲介人 is a more common word for intermediary or mediator, while 中継ぎ人 is less frequent and may carry a nuance of relaying or passing on.
代理人 specifically refers to a legal or formal representative, whereas 中継ぎ人 is a broader term for any go-between.
Standard kanji spelling.
Irregular kanji usage; 仲 is not standard for this word.
Compound of 中継ぎ (relaying, intermediation) and 人 (person). The exact historical derivation is uncertain, but the word transparently means 'person who relays or acts as an intermediary'.