An electrical connection terminal structure comprising: a main body defining a chamber, the main body having a wire inlet in communication with the chamber, the wire inlet of the main body being for a conductive wire to be inserted into the chamber; a terminal pin mounted in the chamber; a shift member having an operation end and a press section, the shift member being reciprocally movable between an opened position and a closed position, a metal leaf spring disposed in the chamber, the metal leaf spring having a first section and a second section, the first section having a head end, the second section having a tail end, the first section being in contact with the press section of the shift member, whereby the press section can press and move the first section of the metal leaf spring; and an elastic unit mounted in the chamber, the elastic unit having a fixed end and a free end, the fixed end being fixedly mounted on the main body, characterized in that: the shift member further has a pivoted end pivotally connected with the main body, so that the shift member is reciprocally pivotable between the opened position and the closed position; the elastic unit is defined with a first side and a second side, the fixed end extending from the first side and the free end extending from the second side, wherein the free end contacts the first section of the metal leaf spring; the main body is provided with a latch member; and the shift member is formed with a restriction section; wherein when the shift member is operated to move toward a closed position, the metal leaf spring is movable along with the motion of the shift member to make the tail end press the conductive wire into electrical connection with the terminal pin to make the latch member to latch with the restriction section to reach the latched position; and wherein when the shift member is moved to the opened position, the latched position is released; whereby the elastic unit pushes away the metal leaf spring, and the free end naturally making the shift member and the metal leaf spring move toward the opened position to release the state where the tail end presses the conductive wire. a main body defining a chamber, the main body having a wire inlet in communication with the chamber, the wire inlet of the main body being for a conductive wire to be inserted into the chamber; a terminal pin mounted in the chamber; a shift member having an operation end and a press section, the shift member being reciprocally movable between an opened position and a closed position, a metal leaf spring disposed in the chamber, the metal leaf spring having a first section and a second section, the first section having a head end, the second section having a tail end, the first section being in contact with the press section of the shift member, whereby the press section can press and move the first section of the metal leaf spring; and an elastic unit mounted in the chamber, the elastic unit having a fixed end and a free end, the fixed end being fixedly mounted on the main body, characterized in that: the shift member further has a pivoted end pivotally connected with the main body, so that the shift member is reciprocally pivotable between the opened position and the closed position; the elastic unit is defined with a first side and a second side, the fixed end extending from the first side and the free end extending from the second side, wherein the free end contacts the first section of the metal leaf spring; the main body is provided with a latch member; and the shift member is formed with a restriction section; the shift member further has a pivoted end pivotally connected with the main body, so that the shift member is reciprocally pivotable between the opened position and the closed position; the elastic unit is defined with a first side and a second side, the fixed end extending from the first side and the free end extending from the second side, wherein the free end contacts the first section of the metal leaf spring; the main body is provided with a latch member; and the shift member is formed with a restriction section; wherein when the shift member is operated to move toward a closed position, the metal leaf spring is movable along with the motion of the shift member to make the tail end press the conductive wire into electrical connection with the terminal pin to make the latch member to latch with the restriction section to reach the latched position; and wherein when the shift member is moved to the opened position, the latched position is released; whereby the elastic unit pushes away the metal leaf spring, and the free end naturally making the shift member and the metal leaf spring move toward the opened position to release the state where the tail end presses the conductive wire.