A TF card connector which is capable of installing a Nano-SIM card, characterized in that the TF card connector comprises: a terminal retaining base; a first card slot disposed on the terminal retaining base and adapted to a TF card, wherein the first card slot has a first longer side and a first shorter side; wherein the first longer side comprises a first portion and a second portion protruding out further to an outer side of the TF card than the first portion, and the second portion comprises a third portion; and wherein a portion of the first shorter side and the third portion of the first longer side extend in corresponding directions perpendicular to each other; a plurality of first conducting terminals disposed on the terminal retaining base, wherein a plurality of first ends of the first conducting terminals are disposed in the first card slot for connecting to the TF card and a plurality of second ends of the first conducting terminals are disposed on a first side of the terminal retaining base for connecting to a main board of a mobile phone; and wherein the first side of the terminal retaining base is parallel to the third portion of the first longer side; a second card slot disposed on the terminal retaining base and adapted to a Nano-SIM card, wherein the second card slot has a second longer side and a second shorter side, wherein corresponding portions (420, 422) of the second longer side and the second shorter side extend in corresponding directions perpendicular to each other; and wherein the portion of the second longer side and the portion of the first shorter side overlap each other, and the portion of the second shorter side and the third portion of the first longer side overlap each other; and a plurality of second conducting terminals disposed on the terminal retaining base, wherein a plurality of first ends of the second conducting terminals are disposed in the second card slot for connecting to the Nano-SIM card and a plurality of second ends of the second conducting terminals are disposed on a second side of the terminal retaining base for connecting to the main board of the mobile phone; and wherein the second side of the terminal retaining base is opposite to the first side of the terminal retaining base. a terminal retaining base; a first card slot disposed on the terminal retaining base and adapted to a TF card, wherein the first card slot has a first longer side and a first shorter side; wherein the first longer side comprises a first portion and a second portion protruding out further to an outer side of the TF card than the first portion, and the second portion comprises a third portion; and wherein a portion of the first shorter side and the third portion of the first longer side extend in corresponding directions perpendicular to each other; a plurality of first conducting terminals disposed on the terminal retaining base, wherein a plurality of first ends of the first conducting terminals are disposed in the first card slot for connecting to the TF card and a plurality of second ends of the first conducting terminals are disposed on a first side of the terminal retaining base for connecting to a main board of a mobile phone; and wherein the first side of the terminal retaining base is parallel to the third portion of the first longer side; a second card slot disposed on the terminal retaining base and adapted to a Nano-SIM card, wherein the second card slot has a second longer side and a second shorter side, wherein corresponding portions (420, 422) of the second longer side and the second shorter side extend in corresponding directions perpendicular to each other; and wherein the portion of the second longer side and the portion of the first shorter side overlap each other, and the portion of the second shorter side and the third portion of the first longer side overlap each other; and a plurality of second conducting terminals disposed on the terminal retaining base, wherein a plurality of first ends of the second conducting terminals are disposed in the second card slot for connecting to the Nano-SIM card and a plurality of second ends of the second conducting terminals are disposed on a second side of the terminal retaining base for connecting to the main board of the mobile phone; and wherein the second side of the terminal retaining base is opposite to the first side of the terminal retaining base.