Sex workers are recognized to be potentially vulnerable to violence and abuse. However, the extent and nature of violence committed against male sex workers remains under reported. The aim of this evidence scoping review was to identify the prevalence of violence against male sex workers globally. A systematic search was conducted of 8 databases from 1990 to the end of December 2016. In total, quantitative data from 27 studies conducted in 18 countries were included in the review. Evidence indicates that some male sex workers, especially those in non-Western countries, do experience high levels of violence. The largest proportion of studies reported data on sexual violence, whilst the most common type of violence experienced overall by male sex workers was that of 'verbal or emotional abuse or threats'. The views and experiences of male sex workers should be integrated fully into sex work debates, policy and service provision.