《无头骑士异闻录 DuRaRaRa!!》（日语：デュラララ!!），是日本作家成田良悟撰写、ヤスダスズヒト（安田典生／安田铃人）绘制插画的轻小说系列。日文版由电击文库（ASCII MEDIA WORKS）出版；繁体中文版由**代理；简体中文版则由天闻角川代理发行。

本作是电击文库史上第一个以无头的人物为主角的作品。描述以池袋为舞台，向往非日常的少年、爱找碴的小混混、跟踪狂的电波系少女、以作情报贩子「为乐」的青年、专接不寻常病患的密医、迷上魔物的高中生以及骑着漆黑色机车的「无头骑士」等共同展开的一连串不正常且爽快的恋爱故事。第一部全13卷已完结，2014年4月开始刊载第二部《无头骑士异闻录 DuRaRaRa!!SH》（日语：デュラララ!!SH）。

Durarara!!(デュラララ!!), often shortened to DRRR!!, is a Japanese light novel series written by Ryohgo Narita, with illustrations by Suzuhito Yasuda, that has also been adapted into a Japanese anime series. Durarara!! tells the story of a dullahan working as an underworld courier in Ikebukuro, an internet-based anonymous gang called The Dollars, and the chaos that unfolds around the most dangerous people in Ikebukuro. The series ran for thirteen volumes, published by ASCII Media Works under their Dengeki Bunko imprint. In April 2014, a sequel series titled Durarara!! SH(デュラララ!! SH,Durarara!! SH) and set 2 years after the events of the original series stated.