We present the results of SiO (2 − 1) and SO 2 (12 4,8 − 13 3,11) line observations of Sgr B2(N) made with the Atacama Large Millimeter/submillimeter Array (ALMA) at an angular resolution of ∼2 ′′. Our analysis of the SiO and SO 2 line emission reveals a bipolar molecular outflow in an east-west direction whose driving source is located at K2. In addition, SO 2 line core shows a north-south velocity gradient most probably indicating a hot core of molecular gas rotating around K2. Fractional abundances of SO 2 and SiO (X(SO 2) and X(SiO), respectively) in the outflowing molecular gas are derived from comparisons with the C 18 O emission. Assuming an excitation temperature of 100 ± 50 K, we calculate X(SO 2) = 2.3 +2.6 −0.4 ×10 −8 and X(SiO) = 1.2 +0.1 −0.1 ×10 −9. The outflow from Sgr B2(N) K2 is characterized as a young (5×10 3 yr) and massive (∼2000 M ⊙), but moderately collimated (∼60 •) outflow. We also report a possible detection of the SiO (v = 2, J = 2 − 1) maser emission from the position of K2. If confirmed, it would make Sgr B2(N) the 4 th star forming region associated with SiO masers. Subject headings: ISM: kinematics and dynamics — ISM: molecules — ISM: individual (Sgr B2) — ISM: outflows — stars: massive — stars: formation