An optical member driving mechanism (3-1001), comprising: a movable portion (3-M) comprising a carrier (3-1030) for carrying an optical member with an optical axis (3-O); and a fixed portion (3-F), wherein the movable portion (3-M) is movable relative to the fixed portion (3-F), and the fixed portion (3-F) comprises a housing (3-1010) and a base (3-1020), the housing (3-1010) is disposed on the base (3-1020), wherein the housing (3-1010) is for protecting the movable portion (3-M), and the movable portion (3-M) is disposed inside the housing (3-1010), wherein the housing (3-1010) has: a top surface (3-1011) extending in a direction that is parallel to the optical axis (3-O); and a side surface (3-1012) extending in a direction that is not parallel to the optical axis (3-O) from an edge of the top surface (3-1011), wherein the side surface (3-1012) has a rectangular opening (3-1015), wherein the optical axis (3-0) passes through the opening (3-1015), characterized in that the base (3-1020) further comprises a barrier (3-1022) protruding towards the top surface (3-1011), when viewed in a direction that is parallel to the optical axis (3-O), the barrier (3-1022) and the lengthwise side (3-1017) of the opening (3-1015) at least partially overlap, wherein a gap is formed between the barrier (3-1022) and the widthwise side (3-1018) of the opening (3-1015), wherein the barrier (3-1022) has a jagged structure (3-1023) disposed to face the top surface (3-1011). a movable portion (3-M) comprising a carrier (3-1030) for carrying an optical member with an optical axis (3-O); and a fixed portion (3-F), wherein the movable portion (3-M) is movable relative to the fixed portion (3-F), and the fixed portion (3-F) comprises a housing (3-1010) and a base (3-1020), the housing (3-1010) is disposed on the base (3-1020), wherein the housing (3-1010) is for protecting the movable portion (3-M), and the movable portion (3-M) is disposed inside the housing (3-1010), wherein the housing (3-1010) has: a top surface (3-1011) extending in a direction that is parallel to the optical axis (3-O); and a side surface (3-1012) extending in a direction that is not parallel to the optical axis (3-O) from an edge of the top surface (3-1011), wherein the side surface (3-1012) has a rectangular opening (3-1015), a top surface (3-1011) extending in a direction that is parallel to the optical axis (3-O); and a side surface (3-1012) extending in a direction that is not parallel to the optical axis (3-O) from an edge of the top surface (3-1011), wherein the side surface (3-1012) has a rectangular opening (3-1015), wherein the optical axis (3-0) passes through the opening (3-1015), characterized in that the base (3-1020) further comprises a barrier (3-1022) protruding towards the top surface (3-1011), when viewed in a direction that is parallel to the optical axis (3-O), the barrier (3-1022) and the lengthwise side (3-1017) of the opening (3-1015) at least partially overlap, wherein a gap is formed between the barrier (3-1022) and the widthwise side (3-1018) of the opening (3-1015), wherein the barrier (3-1022) has a jagged structure (3-1023) disposed to face the top surface (3-1011). <EOS>