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 (202, 203) having a mating section (2021, 2031) extending out of the front of the insulative body and entering into the insertion port, a welding section (2022, 2032) extending out of the rear of the insulative body and being exposed outside of the mounting port, and a retaining section (2023, 2033) located in the insulative body; these upper and lower terminals including multiple differential pairs of signal terminals (202', 203') 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 (2021, 2031) of the upper and lower terminals (202, 203) are bent toward opposite directions; characterized in that the retaining section (2023', 2033') of each signal terminal (202', 203') is disposed to be a serpentine shape and exposed in the corresponding first opening, and in that the width of the serpentine retaining section (2023', 2033') of the signal terminal is equal to that of the straight retaining section (2023") of the grounding terminal; and the serpentine retaining section (2023', 2033') 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 (202, 203) having a mating section (2021, 2031) extending out of the front of the insulative body and entering into the insertion port, a welding section (2022, 2032) extending out of the rear of the insulative body and being exposed outside of the mounting port, and a retaining section (2023, 2033) located in the insulative body; these upper and lower terminals including multiple differential pairs of signal terminals (202', 203') 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 (2021, 2031) of the upper and lower terminals (202, 203) are bent toward opposite directions; characterized in that the retaining section (2023', 2033') of each signal terminal (202', 203') is disposed to be a serpentine shape and exposed in the corresponding first opening, and in that the width of the serpentine retaining section (2023', 2033') of the signal terminal is equal to that of the straight retaining section (2023") of the grounding terminal; and the serpentine retaining section (2023', 2033') has multiple triangular teeth formed on two edges of the retaining section.