Outer conductor terminal and shield connector

An outer conductor terminal, comprising:

• a terminal body capable of surrounding an outer periphery of an inner conductor terminal;
• a back plate portion for closing a back surface opening of the terminal body in a closed state by being displaced from an open state to the closed state with respect to the terminal body;
• and
• a side plate portion connected to the back plate portion, the side plate portion constituting a part of a side surface part of the terminal body in the closed state,
• wherein:
• the back plate portion includes a board connecting piece projecting toward a circuit board and to be electrically connected to the circuit board,
• the side plate portion includes a linear slit extending toward the circuit board in the closed state and a locking portion bent via the slit, the locking portion holding the back plate portion in the closed state by locking the terminal body, and
• the locking portion is formed into a flat trapezoidal shape bulging from a substantially U-shaped peripheral edge part having a front edge and upper and lower edges located in front of the slit.