A high speed socket connector comprising: a case having an insertion port located on the front of the case, and a mounting port located on the rear of the case and being opposite to the insertion port ; a terminal module being mounted into the case from the insertion port ; the terminal module including an insulative body , a row of upper terminals formed on the insulative body, and a row of lower terminals formed on the insulative body; the insulative body forming multiple first openings and multiple second openings ; each of the upper and lower terminals having a mating section extending out of the front of the insulative body and entering into the insertion port , a welding section extending out of the rear of the insulative body and being exposed outside of the mounting port , and a retaining section located in the insulative body; these upper and lower terminals including multiple differential pairs of signal terminals and multiple grounding terminals (202", 203") adjacent to these signal terminals; wherein the retaining section (2023") of each grounding terminal (202", 203") is disposed to be a straight shape and exposed in the corresponding second opening ; the high speed socket connector further comprising an upper shield mounted on the top of the terminal module , and a lower shield mounted on the bottom of the terminal module , wherein the mating sections of the upper and lower terminals are bent toward opposite directions; characterized in that the retaining section of each signal terminal is disposed to be a serpentine shape and exposed in the corresponding first opening , and in that the width of the serpentine retaining section of the signal terminal is equal to that of the straight retaining section (2023") of the grounding terminal; and the serpentine retaining section has multiple triangular teeth formed on two edges of the retaining section. a case having an insertion port located on the front of the case, and a mounting port located on the rear of the case and being opposite to the insertion port ; a terminal module being mounted into the case from the insertion port ; the terminal module including an insulative body , a row of upper terminals formed on the insulative body, and a row of lower terminals formed on the insulative body; the insulative body forming multiple first openings and multiple second openings ; each of the upper and lower terminals having a mating section extending out of the front of the insulative body and entering into the insertion port , a welding section extending out of the rear of the insulative body and being exposed outside of the mounting port , and a retaining section located in the insulative body; these upper and lower terminals including multiple differential pairs of signal terminals and multiple grounding terminals (202", 203") adjacent to these signal terminals; wherein the retaining section (2023") of each grounding terminal (202", 203") is disposed to be a straight shape and exposed in the corresponding second opening ; the high speed socket connector further comprising an upper shield mounted on the top of the terminal module , and a lower shield mounted on the bottom of the terminal module , wherein the mating sections of the upper and lower terminals are bent toward opposite directions; characterized in that the retaining section of each signal terminal is disposed to be a serpentine shape and exposed in the corresponding first opening , and in that the width of the serpentine retaining section of the signal terminal is equal to that of the straight retaining section (2023") of the grounding terminal; and the serpentine retaining section has multiple triangular teeth formed on two edges of the retaining section. <EOS>