Metal Detecting Laws in Thailand

Thailand's พระราชบัญญัติโบราณสถาน โบราณวัตถุ ศิลปวัตถุ และพิพิธภัณฑสถานแห่งชาติ (Act on Ancient Monuments, Antiques, Objects of Art and National Museums) doesn't mention metal detectors, and no law we read sets a general rule on searching, so whether you may detect could not be confirmed. What the Act does say is clear: antiques and art objects found hidden, buried or abandoned with no owner belong to the State and must be handed in, for a reward of up to a third of their value. Digging at an ancient monument needs the Fine Arts Department Director-General’s order or written permission.

The rules, land by land

Even where detecting is allowed, archaeological and historic sites are protected, and you must fill every hole and follow posted rules. Always confirm the current rule with the land manager.

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No detector rule we could find

The Act on Ancient Monuments, Antiques, Objects of Art and National Museums (1961, amended 1992) doesn't mention metal detectors or set a general rule on searching, and neither does the National Parks Act of 2019, so we couldn't confirm whether you may detect in Thailand. We didn't read forestry law, coastal rules or the civil code's rules on lost property and treasure.

What the Act does regulate is digging at monuments and what happens to finds. An ancient monument (โบราณสถาน) is immovable property useful to art, history or archaeology by its age, construction or history, and includes archaeological sites, historic sites and historical parks. An antique (โบราณวัตถุ) is an old movable object, whether made by people or natural, part of an ancient monument, or human or animal remains, useful in the same way.

Ancient monuments

The Act doesn't regulate sweeping with a detector, but at an ancient monument, digging up anything, or repairing, altering, demolishing, moving or building on it, needs an order or written permission from the Fine Arts Department's Director-General, and any conditions in the permission must be followed. Breaking that rule carries up to three years in prison, a fine of up to 300,000 baht, or both.

Trespassing on, damaging or destroying an ancient monument carries up to seven years in prison, a fine of up to 700,000 baht, or both, and up to ten years, a fine of up to one million baht, or both for a registered one. Officials may enter a monument to check for digging and seize objects suspected to come from it.

National parks

Inside a national park, no one may occupy land, build, clear, burn or do anything else that degrades or changes the condition of the area, or collect, remove or harm wood, soil, rock, gravel, sand, minerals, petroleum or other natural resources. Park officials can permit the collecting only for purposes such as survey, study, research, filming, photography, nature study or beneficial tourism. Detector sweeping is not named, but digging up a target changes the terrain and is prohibited under s. 19(1); the permission route in s. 22 does not cover that paragraph. Section 23 separately authorizes officials for its specified statutory duties.

Finds and reporting

Antiques and art objects hidden, buried or abandoned in Thailand or its exclusive economic zone, where no one can claim them, belong to the State, whoever owns or holds the land. Whoever finds one must hand it to an official under the Act, an administrative officer or the police, and is entitled to a reward of up to one third of its value, set by a committee the Director-General appoints. You can appeal the figure in writing to the Director-General within 15 days, and that decision is final. The Act sets no deadline in days for handing a find in.

Find more, remember where

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