A card connector includes a transmission conductor assembly that includes a backup transmission conductor, a first signal transmission conductor, an inspection signal transmission conductor, a first grounding transmission conductor, a command reset transmission conductor, a first differential transmission conductor, a second differential transmission conductor, a second grounding transmission conductor, a third grounding transmission conductor, a fourth grounding transmission conductor, a first power transmission conductor, a second power transmission conductor, a third differential transmission conductor, a fourth differential transmission conductor, a second signal transmission conductor, a fifth grounding transmission conductor, a sixth grounding transmission conductor, a seventh grounding transmission conductor, a fifth differential transmission conductor, a sixth differential transmission conductor, and a write-protection transmission conductor, each of which has two ends respectively forming a spring section and soldering section. The soldering sections, being so arranged, achieve advantages of bettering high frequency performance, reducing capacitive effect, and suppressing electromagnetic radiation interference.