Joseph Mortimer Granville (4 May 1833, Devonport – 23 November 1900, London) was an English physician, author and inventor known for having first patented the electromechanical vibrator for relief of muscle aches, exclusively for male patients.

It was also claimed by Rachel Maines that the device was used to treat hysteria, by bringing women to orgasm, but her work is not historically accurate.

He practised at one time in Bristol, but afterwards settled in London, and gave particular attention to the treatment of gout, upon which he wrote largely.

[4] However, the publication of this theory has been described as representing "a failure in academic quality control"[4] by academic researchers who, on reviewing the primary sources from Maines' book, "found no evidence in these sources that physicians ever used electromechanical vibrators to induce orgasms in female patients as a medical treatment".

[6] In his 1883 book, Nerve-Vibration and Excitation as Agents in the Treatment of Functional Disorder and Organic Disease, he wrote, "I have never yet percussed a female patient ...