Police are investigating the theft, which occurred sometime last week between 17:00 on Monday 13 July and 17:00 Friday 17 July.
Anyone who has seen this trailer or has any information about its theft is asked to report that information to Guernsey People.
People can contact PC 177 Le Galloudec on 725111 or call CrimeStoppers anonymously on 0800 555 111.
Pictured top: The black metal boat trailer that has been taken from Rousse Boat Yard in the Vale.