The hospital said it had received similar cases in the past, with patients items such as ballpoint pens and cables up their penises.
When he finally did visit a doctor, he told them he had got into trouble while engaging in 'urethral play'.
Jiann Bang-bing, head of urology at Kaohsiung Veterans General Hospital in Kaohsiung, Taiwan said the plastic rod measured 20cm (7.87 in) long and 1cm (0.39 inches) wide.
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Accident
The patient claimed he was pleasuring himself when he accidentally inserted the device into his bladder.
A routine cystoscopy - an endoscopic procedure into the man's bladder - helped remove the toy, which had already caused inflammation and blood in his urine.
The patient was discharged from hospital and is expected to make a full recovery.
Doctor Jiann reminded members of the public to properly sanitise sex toys and to make use of lubricants in order to avoid serious injury.
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Golf balls
Others have also been admitted with golf balls and light bulbs stuck up their anuses, the hospital added.
