An object of the present invention is to provide a functional fishing tackle capable of measuring water temperature and depth, facilitating the detachment of a fishing rod on a fishing line, In order to achieve the above object, according to one aspect of the present invention, there is provided a fishing tackle having a fishing line through which a fishing line is formed at a center, a buoyant portion formed of a transparent plastic material and having a space formed therein for buoyancy, A weight portion having a bolt protruding portion screwed with the nut groove portion and having a certain mass of ceramic material； A floating body formed inside the buoyancy portion and capable of inflowing fluid into the inside of the buoyancy portion, the body having an opening for allowing the inflow of seawater into the inside, a plurality of inflow holes formed in the inside of the body for receiving seawater, And a hermetically sealed chamber which is formed at a lower portion of the inflow plate to seal the inside of the body to form a closed space therein, A water pressure transfer thin plate installed in close contact with a bottom surface of the water sensing membrane to be deformed correspondingly to the water sensing membrane, a water pressure transmission thin plate provided under the water pressure transmission thin plate and compressed in accordance with the deformation of the water pressure transmission thin plate, A spring for restoring the hydraulic transfer thin plate after the disappearance, a spring provided at the lower portion of the spring, A water depth measuring means including a water depth meter for measuring a water depth at which the buoyancy portion is positioned by leaving a trace as the measurement solution flows in communication with the bottom portion of the body； A water temperature sensor formed on an outer surface of the buoyant portion to sense water temperature； And a light emitting part including a battery installed on both sides of the b
