A protection member and conductive plate assembling structure of rail terminal, comprising: a conductive plate (1, 3, 5) having at least one assembling end (11, 31, 51), at least one connected section (13, 33, 53) being disposed on one side of the assembling end(11, 31, 51); and a protection member (2, 4, 6) having an assembling passage (25, 45, 65) for the assembling end (11, 31, 51) to extend therein, a contact wall (21, 41, 61) being disposed on one side of the assembling passage (25, 45, 65) for attaching to the assembling end (11, 31, 51), one side of the contact wall (21, 41, 61) being bent and connected with a sidewall (22, 42, 62) in adjacency to the connected section (13, 33, 53), the sidewall (22, 42, 62) being formed with an elastic connection section (223, 422, 622) corresponding to the connected section (13, 33, 53) so that afer the assembling end (11, 31, 51) of the conductive plate (1, 3, 5) is inserted into the assembling passage (25, 45, 65), the elastic connection section (223, 422, 622) has elastically restored to its home position and the connected section (13, 33, 53) is engaged and located by the elastic connection section (223, 422, 622), characterized in that a single sidewall (22, 42, 62) is formed with the elastic connection section (223, 422, 622) corresponding to the connected section (13, 33, 53) and so that when the assembling end (11, 31, 51) of the conductive plate (1, 3, 5) is inserted into the assembling passage (25, 45, 65), the connected section (13, 33, 53) pushes and passes through the elastic connection section (223, 422, 622), whereby after the elastic connection section (223, 422, 622) elastically restores to its home position, the connected section (13, 33, 53) is engaged and located by the elastic connection section (223, 422, 622) so that the protection member (2, 4, 6) and the conductive plate (1, 3, 5) can be securely connected with each other. a conductive plate (1, 3, 5) having at least one assembling end (11, 31, 51), at least one connected section (13, 33, 53) being disposed on one side of the assembling end(11, 31, 51); and a protection member (2, 4, 6) having an assembling passage (25, 45, 65) for the assembling end (11, 31, 51) to extend therein, a contact wall (21, 41, 61) being disposed on one side of the assembling passage (25, 45, 65) for attaching to the assembling end (11, 31, 51), one side of the contact wall (21, 41, 61) being bent and connected with a sidewall (22, 42, 62) in adjacency to the connected section (13, 33, 53), the sidewall (22, 42, 62) being formed with an elastic connection section (223, 422, 622) corresponding to the connected section (13, 33, 53) so that afer the assembling end (11, 31, 51) of the conductive plate (1, 3, 5) is inserted into the assembling passage (25, 45, 65), the elastic connection section (223, 422, 622) has elastically restored to its home position and the connected section (13, 33, 53) is engaged and located by the elastic connection section (223, 422, 622), characterized in that a single sidewall (22, 42, 62) is formed with the elastic connection section (223, 422, 622) corresponding to the connected section (13, 33, 53) and so that when the assembling end (11, 31, 51) of the conductive plate (1, 3, 5) is inserted into the assembling passage (25, 45, 65), the connected section (13, 33, 53) pushes and passes through the elastic connection section (223, 422, 622), whereby after the elastic connection section (223, 422, 622) elastically restores to its home position, the connected section (13, 33, 53) is engaged and located by the elastic connection section (223, 422, 622) so that the protection member (2, 4, 6) and the conductive plate (1, 3, 5) can be securely connected with each other.