A report from the TUC and YouGov shows 21% of the workforce has witnessed bullying where they work.
Men are more likely to be bullied (16%) than women (12%), and it is not only low-paid staff who face the problem, with those earning less than £20,000 experiencing less bullying than those who earn between £20,000 and £60,000.
TUC general secretary Brendan Barber said: "This level of bullying at work is completely unacceptable. Every organisation needs to have an anti-bullying policy, and every manager should ensure there is zero tolerance of bullying either by line managers or workmates."
The TUC has also released statistics showing two and a half million people feel unsafe at work and 24% are unhappy in their job.
Workplace bullying still a problem
Three and a half million UK employees say they have been bullied in their current job.
