A semi-transmissive liquid crystal display device 10 having a first substrate which is partitioned by signal lines 13 and scanning lines 12 provided in a matrix pattern in which a reflective part 15 and a transmissive part 16 are formed on respective positions, a second substrate which is formed with a color filter and a common electrode, and a liquid crystal layer which is provided in between said two substrates, whereina pixel electrode 19 which is provided on said reflective part 15 and said transmissive part 16 is formed so as to overlap with said signal lines 13 and said scanning lines 12 via an insulating layer when viewed from the upper side,a width L1 of the signal line 13 corresponding to said transmissive part 16 is greater than a width L3 of said signal line 13 corresponding to said reflective part 15, andan overlapping width L2 of said pixel electrode 19 and said signal line 13 corresponding to said transmissive part 16 is greater than an overlapping width L4 of the pixel electrode 19 and said signal line 13 corresponding to said reflective part 15. As a result, it will be possible to provide a semi-transmissive liquid crystal display device having good contrast without any negative effects on display quality such as cross-talk or the like can be provided.