diff --git a/backend/resources/js/child/auth/register/index.jsx b/backend/resources/js/child/auth/register/index.jsx
index 7a20682b..8a7c9343 100644
--- a/backend/resources/js/child/auth/register/index.jsx
+++ b/backend/resources/js/child/auth/register/index.jsx
@@ -150,7 +150,7 @@ const ChildSignUp = (props) => {
 
                 <div className="edit-set">
                     <label htmlFor="email"   className="control-label"> メールアドレス </label>
-                    <input type="email" name="email" id="email" placeholder='半角英数字8文字以上' className = {`input-default input-nameSei input-h60 input-w480 ${ _422errors.email && "is-invalid c-input__target" }`}  value={email} onChange={e=>setEmail(e.target.value)}/>
+                    <input type="email" name="email" id="email" className = {`input-default input-nameSei input-h60 input-w480 ${ _422errors.email && "is-invalid c-input__target" }`}  value={email} onChange={e=>setEmail(e.target.value)}/>
                     {
                         _422errors.email &&
                             <span className="l-alert__text--error ft-16 ft-md-14">