Battery pack with improved stability

A battery pack is provided comprising at least a first battery module (100) and a second battery module (100) coupled to each other, wherein each battery module (100) comprises a plurality of secondary batteries (110) stacked along a first direction (X), and a pair of end plates (150) disposed at both end portions of the plurality of secondary batteries (110) along the first direction (X). The first battery module (100) and the second battery module (100) are arranged along a second direction (Z). Further, at least one supporting block (200) is arranged between the first and second battery module (100), the at least one supporting block (200) being separate from the end plates (150) and having contact surfaces contacting the first and second battery modules (100).