Abstract: An adjustable fishing sinker release enabling release of a sinker from a fishing line after a fish has been hooked includes a generally hollow housing member, open at both ends, bearing a hole proximate one end for attachment to a fishing line, and a release slot along one side for releasable capture of a sinker. A pin member is slidably engaged within the housing member, and includes a first leg portion that catches on the housing member and prevents disengagement, a loop portion for attachment of a fishing hook, and a second leg portion that selectively extends across and closes the slot on the one side of the housing member. When a fish strikes the fishing hook, the pin moves to the open position, opening the slot and releasing the sinker. The force required to move the pin may be easily and conveniently adjusted either at the time of manufacture or in the field to fit the intended catch.