Police are asking Graham Wragg to make contact after he left his home in Brimington without telling friends or family where he was going.
He left his house in Church Street in September last year and was reported missing to police earlier this month.
Mr Wragg has previously spent time in Spain, particularly in Barcelona and Santander, and officers believe he may have travelled to the country. The 52-year-old might not realize that he has been reported missing by his family.
Officers are urging Mr Wragg to contact his family, or ring Derbyshire Constabulary on the UK number 101 or 0044 345 123 3333 from outside the UK.
"His family are worried about him and want to hear that he is OK," a spokesperson for the police department told The Local.