This is a list of German football transfers in the 2009–10 winter transfer window by club. Only transfers of the Bundesliga, and 2. Bundesliga are included.
In:Out:Note: Flags indicate national team as has been defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.[1] }
In:[7] Out:[8] [9] [10] [11] [12]
In:[13] [14] [15] Out:[16] [17] [18]
In:[19] [20] [21] Out:[22] [22]
In:Out:
In:[25] [26] [27] [6] [28] [29] [30] [31] [32] [33] Out:[15] [34] [35] [36] [37]
In:[38] Out:[39] [40] [14] [41]
In:[42] [43] [44] [45] Out:[46] [47] [48] [49]
In:[50] [51] [52] [12] Out:[53]
In:[54] [55] Out:[56] [57] [58] [56]
In:[59] [35] Out:[60] [61] [62]
In:[63] [64] [65] [66] Out:[67] [68] [69]
In:[72] [73] Out:[74] [75] [76]
In:[77] [78] [8] [79] [80] Out:[81] [82]
In:[56] Out:
In:Out:[89]
In:[93] [94] [60] Out:[95] [96] [97]
In:[101] [102] [103] [104] [105] [104] [74] [106] Out:[107] [108] [109] [110] [111] [112] [113]
In:[114] [115] [116] Out:[101] [117] [118]
In:[119] [76] Out:[120] [121] [122] [123] [124]
In:[125] [126] [127] [127] Out:[128] [129] [41] [130]
In:[95] [117] [75] [37] Out:[131] [132] [133]
In:[134] [135] [136] Out:[135]
In:[92] Out:
In:Out:[138]