Abstract : This study develops baseball uniforms for amateur baseball players with excellent appearance and functionalmovement. This study selected a conventional baseball uniform and developed a new one for amateur baseball playerswith improved function and appearance based on previous research results. In case of developed baseball uniform mate-rials, this study used polyurethane mixed fabric for the top to improve flexibility. A mesh material was used at the armpit,back, and bottom of the top, side line of pants and pockets to improve breathability. In addition, quilted material was addedto the knee to improve durability and protection. For the patterns and design, this study used a gusset under the armto assist in comfortable movement as well as reduced the length of the top and circumference of the hem to decreaseunnecessary parts. For the pants, this study used a waistband gripper to avoid the top riding up, added darts behind theknees to bend comfortably, and added additional fabric inside the hem to prevent dirt. In addition, we reduced the widthand length of the pants. Wearing evaluation was divided into appearance evaluation by experts and on-site-wearing testby baseball players. The wearing evaluation results for the developed baseball uniform indicated higher evaluations thana conventional baseball uniform in all sections as well as showed significant differences in all sections. The result of move-ment adaptability evaluation showed the highest satisfaction for ‘the top does not ride up’ and ‘dirt do not get in’.Key words : baseball(야구), social baseball(사회인 야구), baseball uniform(야구복 ), sports uniform(운동복 )